Hi welcome to Health care magic forum.
Thanks for choosing H.C.M.F.
Don't worry about the stomach pain, it may be due to gastric irritation due to type of food you had at some time during these 3 months. It can be corrected by using P.P.I, and antacids with the advise of your doctor.
in the hands and feet should be taken care of , i advise you to consult a physician, to exclude any possibilities of post partumaclemptia, though occur immediately after delevery, it can occur at any time below 4 months after delevery,there may be increase in B.P., or proteine in the urine are the confirming factors. It is only to exclude the condition.
The numbness also could be due to anaemea , neuritis
Wishing for a quick recovery, if you have any doubts you can approach the H.C.M.F.