Mental health or something else?

Please help!! Looking for advice because sometimes I feel crazy!

Starting in the beginning of February I started noticing my depression and anxiety getting worse as well as fatigue after having both the flu and a stomach bug. A week later I got into a car accident and sustained a minor concussion as well as started having palpitations, elevated heart rate, tremors.

I also thought that maybe it was a bit of PTSD and concussion stuff but after a few weeks I was cleared and completely back to driving. However 3 months later (now) I’m still having a lot of physical symptoms including the heart elevation, palpitations, tremors, GI issues (switching diarrhea and constipation plus abdominal pain), extreme fatigue, heat sensitivity, depression and anxiety and more.

I already tried upping my Lexapro dose and if anything just made it worse and I’ve had my thyroid checked. Yes I’ve had some mental health issues in the past but nothing as physical as this. It’s just very hard and I don’t understand what’s going on or how to help my body. Klonopin and propranolll has been the only things that have really calmed me and I’ve tried exercise, breathing, mediation, therapy and yeah. It’s hard not having answers and just not feeling like myself anymore:(