Every night i take sprintec (combo birth control) , melatonin and prozac all at the same time. is that okay to do? will it affect my birth control? any interactions?

Sounds ok: A person who takes her birth control pills, melatonin, and Prozac separately without any medication problems should be able to take them together without creating a new problem. The three medications should not have any noticeable symptomatic interactions, and should work just the same way as if they were taken separately. She can check with her prescribing doctor for proper advice.