Yes, it's possible the probiotics are causing increased bleeding. There's a school of thought that you shouldn't take probiotics or should ease into them very carefully if you are in a bad flare and are inflamed to the point you're still experiencing bleeding. My personal experience with Primal Defense was not good. After a couple of days of seemingly feeling better and bms firming up, I took a turn for the worse and continued to have problems until I stopped the PD, at which point I immediately felt much better. I've found I need to avoid wheat and gluten to feel my best and, in retrospect, I wondered if the wheatgrass component of PD wasn't a problem for me. I'll never know for sure. I do know that some experts in the probiotic field - including Natasha Trenev - recommend avoiding soil based organisms because not enough is known about them or their long-term effects. A number of people have adverse reactions and all that's enough to make me wary of ever trying them again.
The probiotic blend that originally brought me out of two years of miserable flaring was Custom Probiotic's six strain powdered blend. I've also had good luck with all of Natren's products and that's what I'm currently taking. You may also notice a few others that are frequently mentioned by members here that have produced good results.
I also eat six meals/snacks a day. As long as you take your probiotic about 20-30 minutes before a meal and/or about 45 minutes to an hour after a meal, you should be fine. Some companies say you can take them with or without food, but from what I've read, they tend to be more effective on an empty stomach. It's especially good to take a dose before bed since that's the longest period of fasting that will help strains colonize.
Diagnosed with ulcerative colitis spring 1999.