scared! help me

Hey guys so I've been with my man for almost 3 years, I'm 18, and I think I'm pregnant, not sure for how long. I was cleaning and all of a sudden I got a terrible pain in my stomach, the kind of pain you feel when you drink too much water 😦 I also got super nauseous, dizzy, and I couldn't breathe... I almost felt like I was about to collapse..  what do you guys think?!?  I can't go to the doctor, I don't have insurance. What do I do?!?! Has anyone ever had this happen before?? 🤔😩 should I be afraid or is this what pregnant women feel??