Please help!

Erin

I'm 3 dpo and I ovulated on January 10 and had unprotected sex on January 8.Ive been having really bad migraines for 2 days including today and having cravings for pickles or something tangy or sour.My migraines are so bad I'm not able to eat.Im also having left mild lower abdominal cramping.Are these early pregnancy symptoms?