could this be pregnancy symptoms?

so I just got off a crazy period my periods have been wacky for a couple months now I just got off a three weeks period fifteen days ago. hormones are fine my dr said my testosterone level was just a lit high but nothing to be concerned about. I'm on metformin because he said it'll help the periods and mixing the pot a little to help me get pg because ttc for year and half now but any ways my boob's have bee. completely sore for eleven days now I've been feeling tired and kind of tiny cramps but it's not like constant cramps you get for periods. I already have one kid I remember having the sore boob's but I was already late for my period so instantly knew but with my periods being out of whack how should i know if this is just my hormones or pregnancy and to when to test :/