Help *a way tmi post*

So to day I have had all day excruciating tummy pains, I have had one bout (sp) of explosive upset tummy followed by what I can only describe as really bad trapped wind pain. I feel like I need to go but every time I sit on the loo...nothing! So maybe I'm now constipated?

Anybody know how I can relieve this pain? Help please and my apologies for the tmi post!

G x