On The 9th Of This Month I Started My Monthly

On the 9th of this month I started my monthly cycle that of which ended abruptly on the 12th after unprotected intercourse. I am due for my next cycle in 3 days. However for the past 2 days I've been experiencing swollen and unbearable pain in my breasts, cramps, heartburn, and nausea. I've been trying to conceive for 2 years and through all that an my cycles I've never once had this problems. Is it possible that I am pregnant?