Early symptoms before missed period?

Jess • 25 years old. Wife. Christian. 👼🏼 2/28/19 ♥️ 3/28/20 👼🏼 ♥️ Due May ‘21 ♥️

Not gonna lie. I’m 7 days out from Aunt Flow’s arrival and I just noticed I have definitely tender nipples. I know it’s so early and some people don’t get symptoms til like week 8 or something but my first two pregnancies I was showing clear signs at 3weeks and got a BFP a week later. Trying not to get my hopes up because I know it could just be a fluke. Anyone else get symptoms before AF is due? What kind? Have they proven to be because of pregnancy?