I Havent Had My Period In A Year And I

I havent had my period in a year and i have been ovulating however i have had unprotevted sex about 5 wweks ago and im having signs of pregnancy such as i feel sick when i smell/eat certian things, having back problems, using the restroom more frequently and having back problems. I was wondering is it possible that i can be pregnant if i have had a menstrual cycle for that long or should i go to see a local OBGYN?