my last period lasted 10 days and on the 4/5 day me and my bf had unprotected sex for no more than 2 minutes. he didn’t cum or anything. now <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> says my period is two days late. should i be worried? ps i’ve only used this app for one period so far so i don’t expect it to be 100% accurate. i’ve been taking a few new vitamins so maybe that threw me off a little bit..?