Pregnant Or Missed Period?? Please help!

Hey ladies. So I'm just gonna go straight to the topic and start off by asking is it possible for me to become pregnant from my BF of 4 yrs, even though, the last time we even had sexual intercourse was like last month? And even then, that night he was so drunk he couldn't even get hard or finish/cum 😂 so we we ended up calling it a night. Weeks later it's the end of August and I'm expecting my period to come, but it it hasn't even started. My bestie is just telling me it's probably stress since I have been having some issues at home, but even so I hardly ever get stressed out to the point where I completely miss my period by 10 days??. My periods are usually always regular and on time and I've never ever missed a period before. So now I'm getting even more worried 😭 I took a pregnancy test before but it was probably too early when I took it, like 4 days in, and came back negative. Should I take one again to double check? Cuz not even my BF thinks I could be pregnant since he swears he didn't cum at all or even get hard. Which I know for a fact he couldn't 🙄Can anyone help me?