Has any one else experienced this ?

I've got a horrendous tummy ache and thought I needed to poo (haven't been in 3 days) I've just tried because I really though I needed to because of these pains! Nothing happen then my body started to push (like a poo) and I threw up all over myself gone dizzy and now my back is fucked from retching! Actually think I'm in labour with these tummy/constipated pains! I feel absolutely fucked ! I'm in a bad way!