Fertility problem. Prevents pregnancy.

Hi Doctor,I am Latha aged 30.married 2 years ago.trying for kids.consulted with Gynecologist who told me that I cannot conceive naturally as I have low egg reserve and small ovaries.every month 4 follicles are growing on right ovary and 2 on left and egg is getting released from right ovary which is growing up to 22 mm and endometrium thickness is 8mm from the month when the treatment has started to me.Doctor is telling that I cannot conceive naturally.need to go for IUI for 2 cycles and after that need to go for Ivf.i am scared that I cannot conceive naturally.can any one please suggest me can't I conceive naturally.i have regular periods with good flow which lasts up to only 2 or 3 days some times.Doctor prescribed me Miprogen tablet to use from day 16.when I researched about it found that it prevents pregnancy.Is that correct.please any one advise me.I will be very thankfull.