do you think im pregnant?

Norma

I've never had a bladder problem. I've only urinated like 6 times a day usually. I counted yesterday, I urianted 18 times. My nipples have been sore some days. And some days I do feel nautious at different times but not everyday. I'm not due for another week on my period. could I possibly be pregnant? By 8 pm I am so exhausted and just want to sleep. I'm 27 years old and don't know if its my body going through change or what's going on.