I'am 4-5 weeks pregnant and have been experiencing upper abdominal cramping for the last few hours (much like constipation; I feel bloated and haven't been able to do much in the bathroom besides urinate----if you know what I mean). It is tolerable, by that, I mean it is not intense pain. I just had slight pink staining/spotting not long ago... I' am wondering if I'm having a miscarriage??