Hi ladies, could do with a little bit of advice.

Hi there, I currently have a 1 year old but I desperately want another baby. I've took alot of tests today which most have very very faint lines but I'm not convinced. I'm due on next Thursday (4 days until AF) am I testing too early? I feel asif I am pregnant but they could be symptoms of AF. (Sore nipples, nausea, brown spotting ) I'm just clutching at straws that maybe I could be. Has anyone ever experienced something similar?? Don't be shy, please comment your experience!!!