Help! Possible probiotic overdose? (sorry maybe tmi)?

I don't know what to do. I've had diarhea for 7 days now with no sign of it getting any better. It occurs throughout the day and night, even disturbing my sleep with bloating and pain. The stool is tan-ish, which according to the research I have done means there is mucus in it.

About a month ago I finished a course of antibiotics for a kidney infection. I am pregnant. I had no bowel trouble.

Because of chronic fatigue, my doctor told me I have candida overgrowth. She put me on a powerful probiotic. The one I used to take was 1 billion live organisms. This one is 15 billion live organisms. I took it for a couple of days with no ill effect. Then the diarhea. I haven't taken it for 4 days now, and yet the diarhea remains.

I don't know what to do. Any thoughts? I'm only asking on here because it's the weekend and I can't see going to the ER for this. Nevertheless, it is quite uncomfortable and I would like relief asap.