I know what it is like to survive not having medical insurance. I know those vicious side effects of a pill that would make a person slit their wrists quicker than logic could be returned because of a pill and I refuse to take them unless it is life or death and for me, I choose my life naturally and naturally to medically help myself. If a doctor disapproves, I go to one that will help me to help myself and not comatose me through life.
The best way to change thoughts that you can't get yourself through is pick up books, workbooks and manuals pertaining to the topics that will help you. Read survivor stories of inspiration of those that have endured greater pits of hurt and hell than what one experiences when in suicidal thoughts. Get free books at the library and even Google Book Preview will let you read 3/4 of most books to help you out.
Call a suicide hotline to have someone non-objectively help you through a crisis. Suicide hotlines have helped me many times through my darkness and pain. It was not the things that was going on with me but the things that are screwed up in society that I can not change or getting disapproval because I am so liberal and against anything of conservative values especially in how to live healthy and happily against the odds. I call them to seek validation of my own logic against the broken systems of living life that majority rolls with. They are there to help you, to listen to you and may refer you to additional help but most will give what you need, just someone to listen who genuinely cares. We are their job security and they never want to lose one person in suicide or lead them death. They will remind you that you are a survivor and remind you though the path has been hard, it is not over and you are done here yet either. That first call is fearful but it is the best call you ever need on speed dial when you feel you have no one.
Occupy your hands in an art, musical instrument or manual labor to sweat it out. The dark clouds and the pain will cease when you allow your body to expel the thoughts that are trapped with in. Refocus your mind to happier times. It all wasn't dark or hurtful and if it is-create new happy thoughts and as many as it takes. Get a pet if you are able to or go to a local park and see nature. You'd be surprised how even watching birds can provoke moments of laughter when you don't want to laugh but the pick me up helps you when least expected. Above all, listen to the core of your heart and mind that is begging for help and find resources to help you that truly work for you.The words certified, licensed nor professional does not mean expert to your particular cirumstances. Always remember that. All of us have our views, ideas, and advice to contribute but it falls upon you what you chose to do or not for yourself.
I have friends who exercise to relieve stress. I have jogged in place for 20 minutes at a time to release the inner struggles I have and done pilates in my own home solo to relieve the stress and the gloom. I would force my body and mind to refocus to work together to overcome the suicidal lows with tears running down my face the whole time. It's not easy and it hurts. But if you try it and realize that there is a good way to hurt the body and mind so to speak by making yourself stand up each time you fall or reach out far enough with knowledge and support to realize you will make it, then it will all start working for you in time.
I hate prescription medications. Unless I fear my life is in danger, I won't take them. The side effects are never worth the benefits that I have found with anxiety, depression, and seizure medications. I research any medical issue that arises in me first. I seek out those who have walked similar or the same shoes for help and support of knowledge in figuring out what I am going to do for me.
I do not have the insurance to go to the doctor as I need to for PTSD and seeking professional therapy but what I do works for me. It keeps me moving forward, keeps me living and I am not just merely getting by or surviving anymore but actually living. Please consider researching books or even a local library for self-help books and turn those thoughts around. You are not alone. The best source of help I have yet to found is a Suicide Hotline. They are welcomed to saving a soul when ever you reach a low that you feel you can't get out of or no one else will understand. They do. Try it.