Could Abdominal Cramps Along With Nausea Be Pregnancy Symptoms?

I had a light period on 2/26-3/2, had a little bit of dark blood on 3/3. Ive had unprotected sex in the middle of February while on birth control. I ve been having cramps, bloating, cravings, fatigue, and nausea since 3/4. I ran out of my birth control pills on 2/22, are these symptoms caused because ill be ovulation or pregnancy? I took home pregnancy tests and all were negative. Maybe its too soon to tell? 3/11 some weird discharge was in my underwear.