You need to undergo a detailed cardiac evaluation. Irregular heart beats occurring on a frequent basis is not to be taken lightly. To start with get an ecg and a 24 hour holter monitoring done which may be required in your case. You will need to get a thyroid function test. Once the cause or abnormality is identified treatment can be initiated. The stomach bloating does not seem to correlate directly with your symptoms. In case you consume alcohol, or too much of coffee it is best you avoid them.