What Causes Vomiting And Loose Stools?

I have had bad pain for 3 days and vomiting I have had colon problems for 6 years I think I'm back up so I started lavatives and have been going like water for 2 days . but I don't know if I could still be backed up I feel like I should feel better now that I have been going so much still having bad pain lower abdomen but hoping its just sore should I be worried don't want to go to ER?