TTC 2nd baby

Kaitlyn
8 months post partum and I've been TTC this month. Today makes 12DPO AF due on Sunday been having On and off tingling sensation in my nipples/breast and a dull pit feeling in my stomach could this be signs? I've tested 4 times already and got BFN! 🙄 still hopefull that I'm pregnant again!! Didn't know I was pregnant the first time until 11 weeks😅😅