Hi ladies

I'm kinda sad been ttc for almost 6yrs now I have a 15 year old daughter. I've been cramping since mid cycle my doc says it was good news since I've been takin clomid he said it's been workin. According to glow my AF is due in 2 days but today I started to spot a little. So my question is whether the spot in is for AF maybe showin up early  my hubby says that it's probably implantation going on help me plz thanx