Hello! I'm A 19 Year Old Female. So I Was

Hello! I'm a 19 year old female. So I was suppose to start my period the 8th of November and it's now the 10th. Seems like no big deal, but I spotted after I used the bathroom one time Sunday and it hasn't came back. I thought I was having my same routine, start a little and then it guadually comes fuller. But no, nothing else has happened. I also feel pressure and the urge to pee. Today I have used the bathroom 10+ times and it's not even passed 6 yet. I've also been constipated for about a month now and I've gained about 8 pounds. My nipples are also sore. Am I pregnant? My partner has never ejuculated inside me but I know that doesn't mean I can't get pregnant. Everyone around me has been saying that I haven't looked like myself in the past 2 weeks. One woman even said to another coworker of mine that I was pregnant and to mark the date.