I've been having these symptoms:
Tender breasts
Feeling sick all the time not just in the morning
Headaches
Eating more
Using the bathroom more
And every time I try to lay on my belly or someone pushes on my belly it hurts really bad. Could I be pregnant?

Possibly as you are exhibiting all the symptoms of someone who is pregnant.

You are also exhibiting premenstrual symptoms. So, as you can see, pregnancy symptoms and premenstrual symptoms can be identical.

You are now playing the waiting game. Wait to see if your next period comes before testing using first morning urine.

If you have had sex, you could be pregnant. Those are the signs for being pregnant