Pregnant?

​So i was suppose to start my period on September 10 and I bleed for about 24 hours then stopped. Since then my breasts/nipples have become super tender and sensitive. I feel like my hormones are going crazy because one minute I am fine the next I am in tears. I got sick this morning and was nauseous yesterday morning and the morning before that. My boyfriend told me my breasts are increasing in size and look swollen. My nipples have gotten a little darker... Am I pregnant?