Had abortion 3 years ago I didn't go for sex after abortion now I am now married from 3 months had regular periods can I conceive now again?

Should be able to. Women in their 20's and 30's, who have regular periods, and who have not had problems getting pregnant in the past, are all presumed to be fertile... until a problem is seen, such as no pregnancy after 9-12 months of having lots of sex every month. Not to worry unless a problem pops up.