I Have Been Diagnosed With A-Fib And Heart Flutter And

I have been diagnosed with A-Fib and heart flutter and heartbeat too fast (fairly often). My prescription is for Pradaxa and propranolol and also take a low dose statin. I have had a serious blood clot in my heart 4 years ago. These 2 new medicines are very expensive. Are there alternatives? (spent 8 months on diltiazam, didn't do anything to help or hinder.- I already have low blood pressure normally.
thank you!