Am I pregnant

I really feel that I am pregnant. My husband and I always use protection but the last day of my period and the day after my period we had sex with no protection. I have recently been experiencing the signs of pregnancy such as very sore breasts also swollen, back pains, frequent urination, I have noticed the montgomery glands getting bigger on my breasts, I have mild constipation, and also a little dizziness. Do you think that I am pregant. Is it possible. I have one child so is it possible that these signs are showing earlier because I have already had one pregnancy. I am not due my period for two weeks but I have taken a pregnancy test that showed negative. But I still feel pregnant. Help me do you think that I am pregnant.