Would really like some opinions.

So fertile week was from the 12th to the 18th in February had sex twice during that time. On the 16th I had a long sticky clear discharge in the morning ( had sex this day). Was nauseous for the whole week after, and got a cold at the end of the week. Af was supposed to come on Sunday and lately I have been regular. So now I'm 2 days late and no sign of af. And I don't know if this has to do with anything but I have been having really bad night sweats.