What Causes Lower Abdominal Pain, Constipation And Nausea?

Started with extreme lower intestinal pains, constipation, feeling extremely cold the first night Followed by extreme nausea, cold sweats, feeling lightheaded, but I didn t throw up Continued constipation, tried glycerin suppository which gave a tiny BM by the second day started feeling pain in lower pelvic area with each step I took, scale of 1-10, 6 3rd day, finally had a small BM greenish yellowish brown in the morning and another one in the afternoon also 3rd day lower pelvic area pain when walking is a 3 out of 10 level pain no fever