Welchol and lower back pain

Going into my second week and experiencing irratic sleeping, lower back pain, occasional nausea and a lot of gas. I'm taking it for IBS and to lower cholesterol. I have also been taking a probiotic and something called chlorella, which is supposed to be one of the healthiest, natural supplement on the planet. So I was thinking the combination of all of the above was causing this. After reading all of the side effects, I'm thinking strongly of quiting the Welchol. Will give it one more week.

Teriible lower back pain and hip pain each morning after sleeping. I am not one to lie awake at night, and typically do not wake up all night. When I "try" to get out of bed in the morning, I can hardley move. Now my fingers are stiff and I can barely bend them, or if I have bent them into a fist during the night, I have terrible trouble opening my hand. Ususally requires the use of the other hand to open or close my fingers. Have alo noticed of late, muscle pain, I have been going to a health club abd haven't worked out in years, but after 4 months, you'd think the muscles wouldn't still be tender...