feeling a little nervous I might be pregnant. last week my breasts were feel extremely sore and tender but I thought maybe because I started taking penicillin for my tooth infection maybe it was effecting my body. my period is a week early. it's different from my usual period. my first day was normal and my second day was extremely heavy which is normal but I had severe lower back pain it felt like when I was going into labor with my second child. today day three should have been a heavy day but it wasnt. this morning it was brownish pink. A few minutes ago it was more than spotting but it's bright red. I took a digital test and it said not pregnant but I'm thinking it could be to early to detect. I'm feeling some abdominal pain now but it not like cramps it's more like a sharp twinge to the left side of my abdomen. I've also been extremely emotional.