Could I be pregnant

So I had my last period January 13-17. I am currently taking clomid. I took mine this last time days 5-9. My last day was January 21st. I took an opk on the 31st and got a positive and this continued for 4 days back to back. I had sex everyday during that time. Now my nipples are a little sensitive, i have twinges in my breast. I gag or have the thought of vomiting and some cramping. My period is due in 9 days.