during ovulation my husband and i had sex, 4-5 days later i had spotting, now my period is 2 days late. we took 2 hpt's one had a slight line (positive) the other negative. over the past week I am experiencing extreme nausea out of nowhere, swollen breast very sensitive. dizziness, headache I cannot stomach beverages I usually drink. the past 2 days bad diarrhea. fatiuge worsening back pain. I had back surgery last year. I am also supper emotional. I have never been pregnant. I have regular periods.