Pain in lower abdomen. And goes off.

Hii...i am trying to cincieve naturally ...last month my doctor prescribed my placentrex injections 7 days course which i completed as i had pain and uncomfortable feeling in lower abdomen which went on and off ....i was alao give mifassi 5000 inj.two months for my follicle didnt rupture itself..also last month i was prescribed MF 500 SR tab OD till i concieve...i am also on ovacare myo for 10 days...vit D Once a week ..as the dr.told me that my gaining of weight is creating hindrance in my concieving due to low metabolism..i am jow on a very healthy diet alongwith half hour daily exercise..i have shed iff some weight i feel flexible a lot nw..but since its my 4th day of periods ..my periods are ended ..i feel sharp pricking pain in right side of mh lower abdomen...which hapenns for few seconds and goes off....i do trust my doctor she has handled my case and d n c very well ..she doesnot feel this pain any issue...as per her no treatmeng is need for this..please guide me why this pain.