Is this normal?

Kylie
Hey everyone! First time TTC, I just got off birth control at the end of July, I was on it for almost 10 years. The first month I put my expected cycle length to what it was when on birth control (28 days) but after thinking that somehow we conceived in the first month of trying AF ended up just being a week late. So I adjusted my numbers to match, 34 days, but now I'm 4 days late again now putting me at 38 days! I don't want to keep taking tests each month with the excitement of thinking that I must be pregnant since I'm so late. So my question is this normal after being on birth control?? Before birth control I remember being very consistent, but I don't remember how many days. 10 years is along time I'm sure things have changed over time lol any advice or suggestions?