Question for the ladies...

Tell your gyn that you have UC and ask if it could be related. In my opinion it's not and I went through a bad time when I had both severe vaginal and rectal bleeding. If you're on the pill that could be the cause.
Yes, also ask your GI about it because a gyn may not be fully up to speed on what UC symptoms are.

Discharge is normal and there is more at different times of the month. During ovulation, you can have slippery discharge, and if there is a tiny bit of spotting, it will look pink. I am sure you will get to the bottom of it at your doctor appointment, but it is very possible it's nothing to worry about.

It's great that your biopsies were normal, but it's weird to have thin stools and blood, even if it's minimal, and no inflammation. I have to wonder if they biopsied areas that were normal and missed the areas that would have shown inflammation. If you use rowasa frequently the inflammation can skip areas. I guess you have to see how you're feeling - if you're not feeling well, you should go back tot he GI and think about increasing your Asacol or adding rectals. If you're 99%, you may want to try using the rectals more frequently on your own to try to get things to 100%. Bleeding can also be caused by hemorrhoids, but i think they would have seen them during your scope... (though my GI never mentioned mine and I had them - my surgeon was the first to mention them).

Sorry I misinterpreted. I don't know what that could be. Maybe clotted blood? I hope you get some answers soon. I am trying to picture what you describe, but I can't quite envision it. :(

When do you see the OB? I don't think the GI will be able to offer much assistance.

You could increase the rectals to 2x a day, or perhaps try uceris foam or something different.

I would go to your GYN. GI doc won't be able to help you with this. It sounds like something not serious. But having it checked out won't hurt and give you peace of mind. Good Luck!