Is it OK to use oral contraceptive while on Retin-A/ Tretinoin cream?

I’m using Retin A/ tretinoin about 3.5 months now , but my pimples still keep appearing. actually it worked on me a bit now my face looks plump shiny and other part is soft but the problem is everytime i wake up in the morning i’m still having new pimple . it’s already 3 and half months since i’m using tretinoin but still didn’t achieve the clear skin that i want . so i want to know if i use oral contraceptive will reduce the effectiveness of Retin A / tretinoin ?