Pregnant?

Ok so I'm on the pill and on the 26th of December I forgot and took it late and I have been having like a period since then ( it's now the 4th of January) but my breasts are sore, they look bigger I think and also when I had sex the other day, it didn't feel the same it was like I could barely feel anything. I also have gained some weight and I look pregnant. I also have noticed like a dark vertical line of hair below my belly button. What's going on?? Thanks for your help.