Cycles

Hey, unsure if anyone else can relate but I stopped my BC in December 2020 and TTC now since March of 2021. My periods have been right on time around 34 days for my cycle. Last month was 43 days for my cycle. Now I am currently late again this month for my period. I know that it can take up to 6 months for BC to get out of your system. Is this my new cycle or is this something I could bring up to my NP? I don't want to get my hopes up thinking I might be pregnant than my period starts 7 days late. Any thoughts would be great!! Thank you!