Alright, my period starts around the 25-27th and ends around the 1st of each month. That was the case for the 1st of September, which was a day that I had sex on. We used a condom, it 100% didn't break, and I haven't had sex since then. Between then and the 9th, I got a fungal infection (nasty, I know) and went to the hospital to get it checked on the 9th. They did a vaginal ultrasound on me and gave me medication, and I also asked the doctor if I was pregnant and she said I wasn't. But I'm still worried because it's I've completely skipped my period now, and I believe an ultrasound couldn't have indicated anytbing at that point. I'm seasonally depressed, and had an incredibly bad relapse this month, so the amount of stress from that could be the cause of this delayed period. Please help! :(