Pregnant but something wrong?

Devan

Hi everyone! I have one son who is just over two years old (that doctors told me I would never be able to conceive or carry and after failing even at <a href="https://glowing.com/glow-fertility-program">IVF</a> for YEARS - here he is!) so that’s my husband and my only pregnancy experience. Because it was so unexpected - thought to be an impossibility - I didn’t even notice my period was late or test for weeks with him. But I’m now (with the knowledge I clearly can get pregnant) seven days late for my period and four days beyond the longest cycle I’ve ever had. Two brands of HPT are still showing negative. What does everyone think? Am I just really late for whatever reason? Is it possible I’m pregnant but not having enough hcg to show yet? Biggest fear right now - Does this mean there is something wrong if I am pregnant?