Wasnt trying, but now hoping...help?

Hey everyone! I'm new here and wanted to get some feelings on some things.

My husband and I had a drunken sex incident late night on the 25th of February without protection. My last period was around the 19th. I'm not sure when I ovulate or if it's regular, but on the 2nd I started feeling major back pain and tightness and mild nausea. On the 3rd, I had the worst headache I've had in a long time. I'm guessing these were possibly ovulation symptoms?

In the last 2 days now, I have been feeling all sorts of nausea and pain/pinching feelings in my breasts. I know it could be nothing, but how soon is too soon to be feeling anything?

I've also had CM that has been the consistency of like clearish/hazy boogers (if that makes sense). TMI I know, but it's not happened before. It's not a lot but has been happening on and off for the last couple of days. Could these be signs? How long should I wait to test?

Part of me really hopes it is true, but I don't want to get my hopes up yet...

Thanks in advance!