can I be pregnant

Nikki
Hey ladies..so I've been feeling like I'm pregnant obviously..don't know if it's in my head or not. Lol. I've been crampy and boobs sore. My period wasn't like usual. I had it nov 19. Very light and little pain. I usually have intense pain..to the point I can't do anything and sometimes throw up. Well I didn't have that..can't remember the last time I had a period without intense pain. Also. I normally have a heavy flow for at least 4 days and the rest is light. I never had a heavy flow and only had to wear a tampon for 2 and half days. I have taken tests the past few days and they are all negative. Is it still possible to be pregnant??