Advice?

Holly • Hi! I`m 21 years young! School full time, while I work part time. I have the most amazing boyfriend in the world, we are like each others best friends and couldn`t be any more happier! ♡
Hello!! So my SO and I are ttc, and we've been working hard at it lately well this past week I've been eating a lot more and now I noticed my boobs and nipple are so tender and my boobs feel kinda like a heavy feeling ( if that makes sense). Either way it's not my normal. Now my period is next week, so is this a sign?? Or what, maybe over thinking it?