Hi,....I had sex on the 10th 11th and 12th of this may. I used condoms. My regular periods were supposed to start from around 17th 18th,...which it did. But it lasted for just two days. The blood was initially bright red and the last day changed to dark maroon. I am having loose motion type pains (and I am having loose motions as well).Apart from that nothing else. Mainly,...my blood color changed,and my stomach area pained and not the area where period pains occur.I had loose motion almost every time my stomach pained. I had one metrogyl 400 tablet to stop the loose motion.Didnt work much.after thati stopped. I m on no medication right now.What is happening to me. My stomach most definitively starts paining after I have a lot of water or after i have my food.