Skipped heart beats

Hi There, There are some days I wake up have a shower then go down for breakfast. I notice that I start getting a bloated stomach and then the missed heart beats. I have had all the tests available including the 24 holter monitor. I was told my heart was structually normal and not to worry so much. I was diagnosed with paramoxall atrial fib back in 1997 and was on fleccinide for 8 years. I have now been put on 25mg atenalol recently and they have helped to some extent but i still get these beats. They make me feel awful like i am dying. On top of the bloated stomach I find it hard to breath and have to constantly burp to relieve the skipping heart beat symtoms. They do go away and feel better but if I do something excessive they tend to come back. I have lost my twin brother 4 years ago to skin cancer and I have had several jobs which turned out to be not what I wanted. I have a new job with a big firm and love it but there is that feeling that if I dont do well I may lose it. I am in sales!! I also look after the folks and spend the day working and then working at home to feed them and shop so I dont stop sometimes. I also like a clean house so I am a perfectionist and have been for many years. Can these skipping heart beats due to STRESS..... Please let me know