I am confused. Did I time this right?

June 29, started mens and it lasted 5 days, July 1, 12 and 13 BD'd... We have no more chances to BD this month, bc of my husbands' field of work. I have had cramping (but on July 13-15) and felt nauseous, had head aches and blood in nose (never had a nose bleed in my life) BBT was 99.1 on July 15.. It is usually 97.4-98.4 What do you think? could i possibly have my BFP this saturday??