Pregnant?

I have had all the symptoms of being pregnant. Nausea, sore breasts, fatigue, frequent urination, headache, and aches in the lower abdomin. The only thing i haven't known is if i missed my period. My bf and I had sex unprotected on day 13 of my cycle the start of my ovulation, I'm now on day 20 of my cycle. Should I wait till I miss my period to know if I am pregnant or is there another way to find out?