Sorry you are not feeling that great.
I understand where you are at the moment, similar thing happened to me!
May I ask a few questions?
- Are (or were you) feeding your baby?
- Are you taking a good multivitamin every day?
Try to eat smaller meals, spaced a few hours apart instead of 3 large meals. (The smaller meals will help you to keep your food down.)
Eat small portions of lean protein (chicken breast, fish is ideal, eggs) with wholewheat carbs like wholewheat pasta and rice. Plenty of fresh veg and salad is also good.
Keep off the colas and fried takeaway foods - these will only make you feel worse. Definately, no candy and cakes. Get your sugar from fruit juice and fresh fruit.
I can bet you aren't sleeping well at the moment are you? Try to have a cat-nap when your baby is sleeping during the day. Don't sleep for too long or you could feel really lethargic afterwards.
Try to keep of alcohol, this is a depressant and not good if you are already feeling low.
Drink lots of fresh water every day. At least 8 glasses, exclusing your normal drinks. (Increase your water consumption if you are breastfeeding.)
Ideally, when you exercise you should raise your heart rate so that you are burning off more calories than you are taking in.
Have you considered trying jogging? This will speed up your metabolism. Jogging/running is free and being in the fresh air at this time of year is more pleasant.
Take is slowly at first, run x 3 a week. Run for 50 yards then walk for 50 yards for first week. Then increase it to run for 100 yards and walk for 50 yards and so on...build up the distance slowly. (if you are running in town use the lampposts as distance markers.)
Finally, go to your health practitioner if you are still concerned - he/she can check you out to rule out other possible healthy issues.
Let me know how it goes. Meanwhile, I hope you start to feel better soon!
PS-don't run just after you have exercised! That can make you throw up! :-(