No period????

So I had a c section on the 1st of July with my baby girlšŸ’œand bled for about 3 weeks. After the birth bleed, I had what was like a normal period for about 7 days (normal for me) and that was it! I've been battling breastfeeding and now my daughter is on formula. I assumed that was what is causing the delay. What else could it be? Is this normal? It's been the entire August and now part of September. I am shit scared to take a pregnancy test, my husband will freak TF out and I am SO NOT READY FOR THAT. we have been careful by using condoms and there was never an ooopsie moment with that. IDK. Please advise.