I have irregular periods and am trying to have a second child. I have been trying off and on for a while now. My husband and I recently started becoming very sexually active and just a day after I started experiencing bad headaches, nauseousness, and mild pains in the right side of my abdomen. Since I don't really know when I will get another period since I go sometimes three months in between could I have gotten pregnant and just started having symptoms right away?

Just buy a few hpts at the dollar store. They are reliable. Since you have irregular periods I wouldn't go and spend the money on the namebrand ones.