I need help/advice

For the last few months I felt pretty good. My pots seemed to have improved and I felt better both physically and mentally. Then, a couple weeks ago, I started getting more symptoms again. I started getting a bunch of stomach issues like bloating, nausea, gas buildup, diarrhea and constipation. My blood pressure has gotten higher even when im laying down, and weirdly enough I get blood pressure drops and pre-syncope whenever I stand up. Im also much more tired, have a lot of brain fog and have trouble sleeping.

I just got my first job and Im starting out soon and im scared I wont be able to work.

Im a 17 year old male with what I believe is hyperadrenergic Pots. I try to exersice regularly (mostly going for walks) and I eat healthy. I take 50 mg of sertraline, 12,5 mg of Metoprolol and probiotics each day.

I now wonder if there is anything I can do to improve my symptoms so that I can work. Should I try different medications, exercise more, or maybe try a diet? Im thankful for any recommendations and help.