constipation, mucus in stool, nausea, dizziness, weak, stomachache, mucus from vagina

For the past week I have been having a sick stomach after i eat or drink anything. It usually comes about 5-10 minutes after i eat or drink then will usually go away within about 15 minutes. It could be any food or any drink, it all makes me feel nauseas. Today is Sunday and the last time i had a bowel movement was Friday. This is unusual and i feel bloated. I've eatten alot since Friday, so I'm wondering where the heck has that food gone if I have no urge to use the bathroom. I tried today & was able to a little & noticed white/lt. brown mucus with the bowel movement. I also noticed some white mucus coming from my vagina. I'm debating if I should see a doctor or if I just have IBS. Also I'm due for my period in about a week, could this be an early sign of pregnancy. I was debating on going to the family doctor tomorrow to see if it was IBS and I'm seeing the gyno on Wednesday. Any help would be greatly appreciated before I go to either doctor! Thanks!