My Concern

I can't take to my husband because he doesn't understand. I have tested three days straight. The first test had a faded positive. The other two were negative. I still have not received my cycle. I am not sure how many dpo I am because my cycle hasn't been regular. I have been cramping for almost a week, I vomit every other day, and my breast have been aching seriously. I have three kids already so I know what pregnancy feels like. I feel like I could be but i'm not sure. Should I keep testing??