Last period was June 14, my cycle is every 28 days. I had unprotected sex 2 times during my ovulation time. The day after our last intercourse 6/30 I have had cramping every day, they feel similar to period cramps. I've been so tired and emotional the past week and I've started to feel nauseas throughout the day and have had heart burn the past few days . I've taken 4 early response test and all came back with a faint line, but took a digital and it came back negative. Am I pregnant?? Thought maybe it was just an evaporation line but the faint line appeared within the 3 minute time frame the instructions said to wait. HELP!!!!