Only one very heavy sore boob/nipple! Could I be pregnant ?

Laura-

Ok so after 3 miscarriages in 2 years it's been really tough, I don't ever have sore boobs but my god my left only left boob is killing me! If anything touches it it feels like sand paper is going over it! Iv never had this unless iv been pregnant! I haven't had a period for 12 weeks but I have pcos so could be normal, iv been feeling dizzy as well, and bloated

Has anyone felt this before and took a positive test? Someone HELP!