Hi,I'm new to this section and I have some questions

Hi! I guess I'll start at the beginning. about a month ago I start getting very small vowel movers, they were pencil thin and had a lot of gas. Both of which had a very specific odor. I couldn't tell you what the smell but they both smelled the same. I put it down to my diet being a bit redundant due to some new changes I had to do because I have a hiatal hernia.
As time went by I was having fewer and fewer vowel movements and I started getting horrible cramping. At this time I was dealing with my period just stopping for no reason so I was not as focused on these things.
Eventually, I started getting the horrible cramping and sharp pains right rib so I went to an urgent care. They did some tests and a ct. The dr there wanted to call in a surgeon because he believed I had ulcerative colitis. I vetoed that plan.
A week later I had the same symptoms plus tons of pressure. My gastro drs nurse suggested I go to the er. They did my tests and X-rays. They found that I was majorly constipated so they gave some red drink in a bottle which I chugged down so I get home. Whatever they gave me made me vomit almost all night.
I saw my gastro dr the next day. He looked at all my tests and said I have a lazy, spasmodic colon. (Still ibs but my colon takes forever to process foods) I'm on a high fibro diet now. And he gave me a nerve pill prescription to stop the colon spasms. He also told me that when I'm having a bad ibs flare that Xanax can stop it.
My question is I'm not supposed to go more than 2 days without a bm what does every use, laxative wise? How long can I expect this extreme bloating, can't even wear my own pants) to last?

I already have had to cut many things from my diet. I saw a dietician after having my gall bladder out and I took a nutrition class which helped a lot.
I already drink glasses of water a day. Sometimes I may throw in some cranberry juice to rinse the Metamucil taste out of mouth. Lol
I really thank you for your interest.
I try to swim 3 times a week because of arthritis and fibro.
I just didn't know if I should add to my routine.

Oh, I hadn't even thought of my medicines!! Thank you so much. That gives me something concrete to work with when I see this new dietician after Christmas.
I appreciate your help. I'm glad I put this here otherwise I may never have thought about my medicines. I really hope tweaking my medicines that it will make this IBS situation a lot easier.