Can i be pregnant

Tishay
Hi, im new to this group and i wanted to know if i can b pregnant. I had my last cycle on dec 14-19 i had high fertility on the 23-28. I had intercourse on the 25 and the 28th and i ovulated on the 28. Can i b pregnant? Ive been feeling really weird and have stomach pains and really bad headaches since the 28th. Whats the chances that my boyfriends sperm came in contact with my egg? Thanks in advance