HELP ME PLEASE

Leah • I love to laugh. If you laugh at my jokes too, then we can be friends.
My husband and I ~always~ use condoms but sometimes we don't put them on straight away and a week ago he didn't put one on early enough and had to just pull out. He did pull out in time, but for some reason I felt weird about it and got super stressed. I know - silly - except now my period is 3 days late. I took a test the day my period should have hit and it was a hard negetive, but it still hasn't come so I'm getting worried again. Is it just my stressing causing the lateness? I've also had clumpy white discharge and headaches... but that might just be stress? Please help me you guys, I will literally keel over if I'm pregnant. 😭😭