Hi, And Yes Please Give Me Some Reassurance. I Trust

Hi, and yes please give me some reassurance. I trust my cardiologist 100%, but I'd like another opinion. I have AFib, hospitalized in Feb 2016, cardioverted 4 times, then finally converted medically. Started on 100 mg flecainide 2x/day and 20 mg Eliquis 1/day. Stopped Eliquis 4/16. Raised to 150 mg flecainide 2x/day sometime over the summer. Diagnosed with DVT in June 2016, started by a different doctor on Xarelto. Started having pitting edema on my feet & lower legs, which I ignored, until I had trouble catching my breath. Saw my doctor on 9/1/16. He d/c the Xarelto, put me back on Eliquis, started me on 20 mg Lasix once a Dwayne and reduced dosage of flecainide to 100 mg 2x/day to reduce edema. Started these meds on 9/5 and by 9/9 was having multiple AFib episodes. Put myself back up to 150mgs 2x/day and still had decreasingly severe AFib episodes all weekend. I saw my Dr. on 9/12/16, and he gave me samples of 5mg Bystolic. He said when the AFib finally subsided, to try 2.5mg with 100 mg flecainide, to try again to reduce the edema. I haven't started that yet. Ive been better this week, until today. Feeling strange all morning - lightheaded, "off" and AFib again. I took 150 mg flecainide and 20 mg Lasix at 8 am, and I think I should try 2.5 Bystolic to help with the AFib my question is drug interactions, and Bystolic is a BP med. I am a 65 yr old female. I just took my BP, and it's 113/77, pulse 90. May I have your opinion on the safety and efficacy of this course of action? Of course, the internet is full of warnings about drug interactions. BTW, I also take 20mg oxycodone 3x/day, .5mg clonazepam 4x/day, 81mg aspirin 1/day, 4mg ondansetron PRN, and 5 mg melatonln 1/day. Thank you.
I'm sorry to have bothered you. I don't know WHY I thought this was a public service to answer questions, although I may have gotten that idea because there was NO MENTION AT ALL OF FEES INVOLVED IN THIS SERVICE. As I previously stated, I was simply looking for reassurance and suggestions, but FUGEDDABOUDIT!! Thanks anyway. And please delete my email address from your files - I am NOT interested in getting a lot of Spam about other medications. Thanks anyway for your time