Wth is going on? 🤔😬

Ki
Okay, so I just had my son 6 months ago. My periods have been pretty normal except 2 months ago mine was a little late but I still had symptoms that I would start so I wasn't worried. This month is different. My fiance decided he didn't need to pull out, while I was ovulating (even though he doesn't want anymore kids LOL). Well now I'm 8 days late. My cycle is usually around 30 days. My periods are usually around 5 days long. I've taken a few dollar store tests and they said negative. Then I took a first response test when I was about 5 days late, also negative. I have no symptoms of either a period or pregnancy. Could I still be pregnant? Wth is going on??? 🤔😬