Honestly, I'm guessing you are not pregnant. There is a slight chance you had a chemical pregnancy (very early miscarriage) and an even slighter chance that you are so newly pregnant. But if you were so newly pregnant, you'd probably not have any symptoms. Symptoms happen when there are a lot of circulating hormones from the pregnancy. So, it usually takes a while for that to develop. Nausea, for example, starts around week 6 to 7 for most women.
So, see what happens. You can test 2.5 days after your last unprotected sex to know for sure. You'd get a positive by then if you were pregnant. good luck
Did you take a test? What did it say??
Well, that's a little frustrating, isn't it? So, hormones CAN be wonky. I had thyroid issues as I mentioned that made my period very late or in other words, a really long cycle, It's hard but I'd wait two more weeks and retest. If still no period, I'd get your hormone levels checked by your doctor. A rare person doesn't trigger a pregnancy test when really pregnant. Don't know if you are that rare person. Let me know!