Can Calcium/Mag sup. cause really back gas pains?

I started to take Calcium and a slow-mag suppliment recently and yesterday I was almost bedriden with painful gas pains. I am still really bloated today with a tender to touch stomache. I was just wondering if it could be the suppliments. I am also taking chlorella, B-complex, femaprin, and shaklee vita-lea, and azo cranberry tablets (just a few days). I just want to know what I need to avoid mixing next time.

I dont know what half of those supplments you listed are

Sorry, I will list what each one is and what I take it for.

Slow-mag is a calcium/Magnesium Suppliment

Shaklee Vita-lea is just my daily multi-vitamins. Shaklee is the company and they are whole-food based

I take a B-complex with supplies me with folic acid and to extend my LP

Femaprin is a vitex/B6 suppliment to regulate cycles

Azo Cranberry is suppose to help prevent UTI and give cranberry suppliment

Chlorella is a single-celled green algae used to remove toxins in your system

I think I added too much too fast (suppliments that is) and somehow caused a bowel obstruction. I feel so much better now but my stomach is still very tender from the waist down. 

I think it's the cal/mag. TMI: I started taking it and got a bit constipated...

 My accupuncturist said that magnesium can give you bad wind.

Try massageing your abdomin in a clockwise motion, this should help "move things along" This works for me when I get bad gas. Ignore the txt on the pic.