Suffocated by Thoughts

Hello everyone. So, recently, I'm being overwhelmed by thoughts and emotions, and it's getting difficult to breathe. The thoughts are getting destructive. As someone who usually thinks a lot, even about the tiniest of matters, this is getting hard to control. I try to latch onto reason to prevent succumbing to the thoughts, but I'm not sure how long I can hold up.

I'm in need of therapy, but am unable to do one due to my current situation, as I'm not the one in control of my life at the moment (The primary cause of my distress). Wonder how long I can keep holding on to reason before snapping.

Thank you for reading