Can period symptoms be a sign of pregnancy?

Ashley
Hi ladies,
  I am starting to get so discouraged. I have been TTC for about 6 months now and I'm hoping this month will be the one. I have been very nauseous and my boobs have been so sore and itchy. Idk if it's all in my head or what. I've also used pressed during my ovulation window but I'm not sure that it worked. I'm almost at the point where I don't even want to try anymore. I never knew it was this hard to get pregnant lol. It's very hard. Anyway, im due for AF on 9/27. Just wondering if it's pms or pregnancy