Should i take a pregnancy test?

so, my period is usually like clockwork (even before i went on the pill), but the past week or so i have just been feeling STRANGE. i have had some mild cramping and lower back pain. i have also been urinating a LOT lately. my period was 2 days late adn when i got it, it starts out heavier (normal) but it completely stopped a couple hours later and then didn't come back until the next morning heavy again. i've also been bloated and exhausted! and i've had headaches almost every day. am i possibly pregnant?