5 days late bfn🙃

My last period started 12/9, I was supposed to start on 1/5. I’ve been tracking my period myself in a notebook since May of 2022 and there’s only been 2/3 times I was off on my expected period by 1/2 days. My last period, I did have the flu and my period ended two days sooner than normal, but I figured I’d just start sooner than expected. I also was on amoxicillin about 4 weeks ago, just after my period ended. And a week after that I got a sinus infection. So I’ve been nonstop sick for a month which I could see throwing my period off. My breasts are sore, I also got the “let down” tingling yesterday randomly that you feel while breastfeeding and I’ve had random bouts of nausea, nothing crazy. My last two pregnancies, I was testing very positive at 3 days late so I’m just looking for some possible insight. Thank you!!❤️