Help? Please?

So I took two test last week the first one was positive and the second was negative. Sadly I think my first one got thrown away. I have been feeling nothing but sickly for about three weeks now. I have been feeling like this since me and my boyfriend had sex the day I stopped bleeding off my period. I've only had one baby and I didn't know I was pregnant with him till almost 2 months into my pregnancy. My mother caught that when she said my period was late. Anyways could my feeling like I'm going to be sick, cramping, my stomach being hard, and mood swings be a sign of pregnancy? I'm also testing tomorrow I just want to make sure this isn't all in my head.