I'm losing my MIND.

Firstly, I'm 20, female, 100% healthy (had a full blood test done 3 years ago and was told that because im still young/healthy I would not need to go get another one for 5 years).

I suffer from GAD and the biggest part of my anxiety revolves around my health. 2 years ago, I noticed a rash on my leg, googled it, and came to the conclusion I had cancer (not enjoying typing the word so im going to just use the letter C). SO, I read symptoms and one of them said dizziness (I only found this symptom in one of the websites out of the 2049924 I searched up). Ever since then, I've been feeling "dizzy". The rash itself went away in like 5 days and I had no other symptoms, even until now. No fever, no feeling tired, no lack of appetite ...

Anyways, the dizziness actually died down last summer and even over this past Christmas break. Then, in early January, I thought I felt a lump so I figured it's C again. Then ever since then I've been feeling dizzy. I have NEVER in my 20 years of life felt this afraid about anything. I keep missing school (still getting good grades though), I'm staying home 24/7 (besides therapy and school), I always wait until it's time to sleep and thats when my anxiety goes down.

Over the past 3 weeks I've had maybe 6 panic attacks and had to take ativan or else I thought I was going to die on the spot. I've also noticed that when im really nervous/anxious then I literally STOP breathing. My therapist even noticed this and said that some people actually stop breathing when they're nervous. Not sure if this is normal or whatever... I literally have to lie down and take in deep breathes and I even have a paper posted on my wall saying remember to breathe but the more I feel anxious the less breathing I do.

My question though: Can GAD cause physical symptoms that get worse/better depending on the situation?

With all this stress/anxiety I've felt:
- Muscle aches
- Dizziness
- Lack of appetite/more eating
- Crying easily
- Headaches
- Heart beat too fast/shortness of breath/not breathing when im nervous

Thanks everyone. Sorry for the recent threads though but I need some help. My next therapy session is next week so I guess until then I just need reassurance.