Anyone? Symptoms so early?

Based off of my last period I am 3 weeks and 3 days. I tested yesterday in the am and in the pm, both positive, but I've been cramping on and off during the whole 2ww, mainly lower back, been very gassy and I've been urinating frequently, especially today. I am only about nine DPO today, do y'all think this is all in relation to pregnancy or maybe a UTI?