If you had a blood clot I assure you that you'd be in dire medical distress right now. As for the blood pressure, yes that is a little high, but only marginally, and remember that anxiety can play into it. My blood pressure has been 140/100+ for months now when it's taken, but that's in an anxious state. When I'm not anxious and it's taken, it goes back down to 130/70.
I get the fluttery feeling in my chest too, but I can assure you that is perfectly normal. Just bring up how you've been feeling with your doctor after you make an appointment, and go from there.
Also coffee is a major stimulator of acid reflux. I went to the hospital 30 times in a row convinced I had a heart condition to the point where they had admitted me, only to find that it was indeed acid reflux. my acid reflux gives me pains on the left side of my chest.
As long as you're not sweating bullets, the pain isn't severe or going into your arm, and you're not short of breath, I'm sure you will be fine. However bring this up at the next doctors appointment and see if there is a way you can better manage your acid reflux. Bring up a drug I take called Rabeprazole. It limits the production of stomach acid, and you can still take tums while on it.