Welcome to the forums! I hope you can find support here and more people come along to offer you their pearls of wisdom ;-)
I'm not a health care professional, I can't diagnose you.
If I were you, I would have all things of physical health checked out first and or simultaneously ask for a Mental Health Care Plan where you can get subsidized counselling. You may find the answers you're seeking in either or both of these paths.
You can always phone the Beyond Blue (BB) Helpline and / or 1800RESPECT to share your feelings and get some feedback from MH professionals. These wonderful helplines can also give you a list of counsellors in your area.
There's lots of information here and great forums on anxiety, if you have a read, you may see some similarities.
I'm not sure....
Only a few weeks ago I was reading a website that a BB Helpline Counsellor referred me to.
It's called the Blue Knot Foundation. I was gobsmacked. I saw myself mirrored in these stories and knew without a doubt that I did have PTSD. It had been informally diagnosed so I kept myself in denial, thinking I could just cope. Then I couldn't... adding 2 police events in 8 days at the same time, my anxiety noticeably skyrocketed and the PTSD was triggered.
I'm now with a Specialist Trauma Psychologist and my Counsellor.
I hope you come back and let us know how you're going.