you got a negative test, You had no intercourse, You had a period..even a light one. You are not pregnant. If you were pregnant the test would have been positve, especially 3 months after you had the "dry sex"your Dr is right...Constipation, weird movements in your stomach, strange bloating..those are all signs of something like Irritable Bowel Syndrome or bowel troubles. I have Irritable Bowel Syndrome and what you describe sounds just like what I go through on a daily basis. You don't feel your baby move until you are about 20 weeks pregnant. Then it is just flutters. No way possible to feel it at 3 months. The movement you are feeling is just gas and digestive tract twitches. The dark skin and dark nipples could be hormones or stress causing your hormones to act up. If you have seen a Dr..then I think you should stop worrying.