Please help. I am freaking out!

I have irregular periods, just started skipping a month. I wasn’t expecting a period during the month of January because that’s the month it was supposed to skip anyway. On Jan. 17 my app says I was ovulating. I didn’t really have sex that day, it was just grinding, but with a condom on. However, in the beginning for maybe about 2 minutes there was no condom. Could I be pregnant from precum? Since I was ovulating. My period was supposed to come February 6,7, or 8, but I had PROTECTED sex on February 2nd and 8th. He said he checked both times with water and the condom was fine, not broken. My period is now late by 15 days... I’ve taken multiple at home pregnancy tests and all came back negative. I don’t know what is happening. Please help. Could stress delay a period for this long?