Mine weren't overly sore before I got my BFP, until 1 week past when AF would have been due (so 5 weeks PG), and then they were so bad that I literally couldn't go a minute without a bra on, I needed the support. It even hurt really bad in the shower. Now that I am trying again, I keep thinking that I am pregnant because they are sore during tww, it's so annoying that AF symptoms are so close to PG symptoms!