What can I do about rapid heartbeat from my meds and caffeine?

I lost my parents, grandparents & husband is less than 5yrs. My husband and mother were only 2 mnths apart and my husbands was a suicide while my 3yr old and I were in the house. Ive tried counselors but still get stuck with not staying focused and the nightmares like a broken record sometimes. I also broke my tailbone that has never healed properly. My dr. has had me on vicoprofin 2x a day for about 5yrs. We've tried every anti-anxiety med and they made symptoms worse & agitated me more. She recently put me on Adderall XR 20mg once in the morning. She also has me on 1mg xanax 2x a day as needed. Along with the Vicoprofin as needed. I also drink coffee pretty much all day long & i'm a smoker. Usually less than 1/2 pack a day but notice I smoke more after taking the pain meds. Ive noticed not too long after taking the adderall along with the caffeine & pain med that I experience rapid heartbeat, shortness of breath and this kind of makes me nervous considering I'm only 32 and both my parents died of a heart attack before they were 50. Ive been at my dr. while this was happening before & my 02 stats was still 98 when I felt like it was alot lower! This is irritating to me and I try to take a xanax to slow the beat down and want to know if this will work. I'm sure its the caffein making most of it happen. Is there a food like milk or anything that will help slow down these palpitations? I just want to be sure this isn't dangerous for me if it continues & love my coffee! Thanks