I take the 7.5's - about 4 or 6 /day

I've had constipation problems before but now it's getting kinda bad. I need advice on what to do about this. I've tried drinking a shot of olive oil per day but that didn't do much. I'm having stomach pains and sometimes theres blood in my feces. I'm kinda feeling affraid now...my cousin takes over 10 10's per day and seeing what he goes through has made me slow down on how many im taking. I used to take about 10 of the 7.5's per day. i cant take the 10's because they make me sick. the 7.5's help me function and helps with numerous other things like anxiety, depression,....you know all those "normal" human feelings.

is there anything i can do to help me settle these stomach problems??!