Thanks to all for the support.
When I was really freaking out I went to the ER. They ran some tests, including bloodwork, and they didn't say there was anything wrong. Yet I continue to worry. My doctor has prescribed me some depression/anxiety meds, but I really don't know if I want to take them. I also have a stomach acid blocker medication and I'm afraid to mix the two. I tried the two together for the first time today and I ended up having a racing heartbeat briefly. I don't know if that was from the combination or from my own thoughts and anxiety about mixing them.