farid,
sounds like it could be dehydration like the doc said...try vitamins and more water. your body is probably depleted of these from fighting infection.
Dear Farid,
I have just found this site and have been reviewing the different posts all afternoon. (I have my own heart issues and have been doing research). One thing I have found common to all heartbeat irregularities is that they are all made worse by caffeine intake. Therefore, I would recommend avoiding all caffeine, chocolate, alcohol, smoking, stimulants, stress and anything else fun but damaging to the health.
Dear Farid,
Malaria and typhoid don't usually attack the heart. I suspect this is due to your prolonged illness and the fact that you body has lost much of its strength and endurance. Much of this should improve as you get back to health and resume normal activities. Also be sure that you are drinking enough water (at least a liter a day).