Constipation!!!!!!!

Casey
Shew, ladies! I don't know what is more miserable throwing up or not being able to go to the bathroom! I haven't been in days. I drink at least 4-5 16oz water bottles a day. I shake a little fiber powder in one each day. My pee is still yellow which is odd to me! Is this due to vitamins maybe? 
Anyways, I have to go so badly but it is painful! I took a Dulcolax this morning and had a little luck but it was so painful I teared up! Any advice would be much appreciated!