How to positively deal with stress/anxiety and learn to take care of myself?

Since a young age I’ve always suffered from anxiety and stress. Lately times have been rough. My anxiety/stress is through the roof. I find myself worrying about everything. I can’t focus. I can’t concentrate. I can’t even watch tv because the whole time I’m just thinking about things to worry about...

I don’t take care of myself. I always put myself last. I hardly eat or drink lately and I’m pregnant with baby number two. So it’s very unhealthy. I have panic attacks too.

Yesterday I ended up in ER because of muscle strain in my neck they said but I was convinced it was something bigger and more serious. I had a huge headache. I even threw up. I came home still believing I was going to die last night. I couldn’t sleep.

Today is a new day. I’m trying SO hard not to be scared all over again and I’m really worried the same thing is going to happen to be today and I’m going to end up convinced again and back into the ER waiting for 5+ hours.

What are some ways to deal with stress? I’ve never had a stress like this before. How to deal with anxiety? How can I take care of myself? Any positive things I can do? I already feel myself getting anxiety as I’m typing this...