Unsure of cycle length after IUD

Anne • 34 wifey, DS Nov ‘18, expecting #2 8/2021

Ttc #2, had my IUD out a month ago and got my period Aug 3...tested using opks from day 14 on and never got a positive for ovulation, today is cycle day 29...unsure of when to expect my period since I haven’t had a cycle since before baby #1. I’ve always had irregular cycles and used Clomid to help with ovulation to conceive the first time! I don’t want to get my hopes up since opks never detected ovulation but know it can happen! I got a BFN today - I had to test because I feel terrible! Think I will test again in a couple days especially if symptoms persist through the weekend. Just looking for some support!! And baby dust!! 🌟