Does any one know if u can get pregnant if hubby had Vasectomy 2 years ago?

My husband had a vasectomy 2 years ago. But this past week I have been haveing every sign of pregancy. And I had what I was sure was my period a week and a half ago it was spotty then little heavy for 2 days then spotty the 3rd day then stopped. Now my are heavy and sore my bachaches, my head hurts i get dizzy a lot I feel fatigued and I get sick at the stomach early in the day. I just don't feel right. I'm optomistc to take a pregnancy test because I don't won't my hubby to flip out because it might be a false alarm. But does it sound like pregnancy signs? Please someone give me a little word for thought.