Normal periods, trying for 3 months to conceive, took ovulation test- when +ve we had sex but still -ve preg. test, do i need to check doc or any reason?

Wait a while longer: Try for at least 3 more months before checking with your doctor.

Possible: It takes 3 months for the hormone cycle to re-establish it self after comming off of any hormones (birthcontrol). If you had the depoprovera shot it can take up to 9 months in some cases. Consider this in making you decision to seek help. Having intercoarse every other day will increase the concentration of sperm delivered to the egg.