Can Ovigyn D,ovofar And Sunten Cause Miscarriage?

i have PCOS with irregular periods. now i am under fertility drugs named ovigyn D,ovofar and sunten 100mg. because we want a baby. recently i had a miscarrige in the month of aug. though i am confused because after i got a positive pregnancy test it was nearly 1 and half month. suddenly after that i started bleeding and the first doc said it was due to hormonal imbalance..and that there is no pregnancy. we live in a very backward place and there is no proper medical facility. after few days i had a checkup in a metro city thn we came to knw it was a miscarriage and that i need to take bedrest from the time i get another positive pregnancy also hv to take external support like injections to protect the pregnancy. i have been taking lots of medicine for last 8months. i am getting upset as well because we badly want a baby. is it very difficult for me to get pregnant? how much time may it take? i also get a mild pain in my ovaries after i start taking the medicines why is it so? why cant i be like other women who can have babies very easily??will i never have a baby?what do i do?please help.