Lots of questions!!!

I went off birth control at the end of Sept (always had normal cycles on bc). Then the next month my period came a week early on 10/25. After that, I started testing with OPKs and finally got a positive OPK on 11/11 & BD on that day and few days before too. Glow says my period is due on 11/26. Can anyone tell me if this is normal? Should I keep testing with OPKs until my period comes? Should I be taking prenatal vitamins already? I just need advice! I'm so confused!!! My husband and I want a baby! 💕