TMI with pic. CD 31 and possible EWCM!!

Bryanne • I`m 24 years old. Been together with my fiance for 6.5 years. We have a 4 year old son and TTC #2, hopefully ASAP!! Baby dust to all!!
1st month TTC and I have no clue what I'm doing. I'm on CD 31 AF is 4 days late. I got a positive opks on CD 17 but with FMU then negative that evening and then again CD 20 and 21 both evening. I'm not sure which positive days to go from. So far all the hpt I've take have been negative. Checked my cm today and I get what looks like EWCM with speck of blood. I don't know what I'm doing so I'm not sure if this means AF is coming or possibly pregnant? Any suggestions??