IBS or something else ?

Hi,
I need treatment for my gut issue.
Last year in November I got side effect of an anti-depressant. I had urine retention issue which doctor told is due to stress I took. I just had one dose of that med and I was at hospital. Vomit, rapid heart rate. A day later I wasn't able to eat anything excess gas, rapid heat rate. Whenever I ate I feel like food was stored on left side of abdomen.I development diarrohea with clear white mucous and somehere lil blood in it.took infection medicine. That cured it.After few days I developed constipation. It was like I was passing normal shaped stool but only in small quantity. Few days later I developed loose motions with brown clored excess mucous. It was for one day only. Constipation prevailed with lil mucous on top of stool. Days later I developed loose stool with foul smell. Took infection medicine. It was cured but then one day I took soup with red chilli.again loose stools. Few days later it converted to constipation which still prevails. With time mucous excretion increased.
Current condition.:
Small amount of constipated stool daily
Very irregular in shape, sometime pallete like.
Mucous white,yellow,brown.
Abdomen pain isn't frequent. Online sometime before passing stool.
Gas issue but no pain due to gas.
CT scan: normal
Liver test: normal

Please assist me.