Ladies, do you think there is a possibility I am pregnant?

Okay so here's the story. I am 19 days late for my period. My period is mostly regular. If I were pregnant I would not mind but I'm starting to worry and think maybe I can't have children. I think thats just my mind messing with me though because I know it takes couples months before they get the baby dust. I heave recently learned that it takes 48 hours for the sperm to refuel so it can work! So basically we did a lot of that work for nothing because we had sex like 2-3 times a day! And over 100 times. Yes we love each other very much but right now I am 19 days late and not sure what to think, I took 2 urine tests at the walk-in-clinic both were negative but right now my breasts are really hurting, and lately I have been going to the washroom frequently and way more then usual. I hope nothings wrong with me to not be able to have children. I am volunteering at this wonderful daycare and just to be around any child puts a smile on my face, so I'd be devastated if something was wrong with me! I need some encouraging positive words :) xoxox.