Should I take a pregnancy test?

I had recently had sex about 6 weeks ago without a condom or any contraceptives (including the pull out method)

I have “missed” my period, however, I do have irregular periods. I also don’t know when I ovulate

Lately, for the past 5-6 days, my breast have been extremely sore and sensitive to touch. But that could just mean that my period is coming, right?

I did urinate 3 times in a matter of 4 hours, however, I did drink a lot of water

I have also been extremely tired but I am a teenager and my sleep schedule is all over the place.

Has this occurred to anyone that has not been pregnant? And should I be concerned? Or should I take a test just to make sure?