Can having sex every day prevent me from getting pregnant? i'm trying to concive. or is it better to try every other day?

Seek evaluation: If semen analysis is generally normal, there is little difference in the conception rates between having intercourse daily vs. Every other day. If you are unsuccessful conceiving after 12 months (6 months if one is older than age 35 years), then would recommend consultation with gyn or infertility specialist for infertility evaluation.

Complex issue: If rom my knowledge there is no difference between sex every other day versus sec every day which can be interpreted differently. It may not be detrimental if you enjoy it but if it becomes work. Try every other day during days 11-17 of a woman's 28 day cycle for 1 or two cycles and see if that helps. After a year, seek professional help.