The problem with cannabis is - there are lots of generalizations and not much specific.
Here is what I know.
-Full plant can be best.
-If you use THC you should use CBD as well**. CBD is the anti-psychotic part of the plant and it can modify THC function. (mellow)
-Less is better. Go low and work up to find a dosage that works.
-Switch strains every couple weeks.
-Try concentrates or other consumption methods.
-Ritualize preparation . Make it a thing. Use it to relax.
-It's about using the least you can. ALWAYS.
The not optional part is - Track usage. Fanatically. Brand, strain, how much, when, affects etc. It will help you find what works best. It will also help you in presenting to your medical team when you have appointments. Besides "we need to get you off thc" from my GP I never hear much from them. They know how much I use, when, why, what products and I have my notebook to back me up.
**Most natural "landrace" strains have a nearly balanced CBD to THC balance. CBD has been bred out for two reasons - it allows the plant to make more THC, and it reduces your "high" feeling. Start at 1-1 and go from there. CBD should take away the paranoid flashback thing. You may not get totally blasted on the THC but it may help fix what you have.
Right now I am doing 3 ml 0-30 (0% THC, 30% CBD) a day morning afternoon and bedtime. Then in the evening after supper, thc. 1 dose 30-0 (THC-CBD) oil. Then about 7 pm thc. From here its like drinking. Some days I want to get bombed -ok good. Most days it's get a buzz and just like drinking - hold it there with a little blast every half hour. Same as having a couple shots and beers and then having a beer or two an hour just to keep your buzz. Either way track it, track it, track it. Things go far better when my T asks and I can look and tell her my usage. Same for the other boatload of healthcare pros I see. As soon as they know you are tracking usage, you are usually golden.