To the OP, I am feeling the same way as you right now. I have been able to prevent it from escalating so far, but I do know where it can go and am fearing that happening again. I too don't want to worry anyone, and for me, at this point I don't think I need to, but it is true that it can change in just minutes so it is a slippery slope.
I am basically hopeless, but am trying to be hopeful the past few days and it is going just ok. I am trying to gently reach out for help without it escalating to have concrete SI. The problem is that others would not know this and the outcome could actually make it worse too. I am also making little notes to myself of things I need to do right now to improve my situation and then doing little bits every day. So far it is working.
I agree with others here, you may just need to let others do the worrying for you right now and tell someone how you are feeling. I have had an attempt before and its not pretty. When I get overly stressed/depressed/anxious I tend to have worse sleep, am unable to eat, get weak physically, and these things further escalate the problem.
Please reach out to someone if you have that kind of support or a professional.