I have returned from a trip, during which I had not had a BM for 4 days. My son gave me a laxative and subsequent to that I had cramps and did have a BM but, also bleeding.. since I have taken my return flights, am home and though eating a little am not able to have a BM, but every time I try I excrete blood and what a ppears to be small pieces of tissue, the blook bright red, the tissue dark red. Should I go to and ER?