I think I am having IBS-Constipation, urination/sexual difficulties. Does anybody have advice?

I am 28 and trying to get to the bottom of a problem I have been having and hope someone can help. I will try to be as specific as possible. I went through an extremely stressful period earlier this year and started to have constipation problems. They werent severe for the first couple months so I kind of ignored them. My diet wasnt exactly great during that period as I was often on the run and had to eat whatever I could get my hands on. Over time, I developed a very slight weakening of my stream when urinating. I would have to wait several moments until after finishing to be sure that everything was out or risk dripping after zipping up. One day maybe a month ago, I had one day where I had a burning sensation all through my lower abdomen coupled with gas that seem to be streaming all around that area. The next morning I went to the doctor and after various checks, was put on an IV relaxant of some sort and given a similar medication along with a powder-based laxative. Later that night I had a bowel moment that was obviously very old stool and mostly had diarrhea for the short term thereafter.

Things seemed mostly fine for about a week after that but then I had kept finding that I really had to strain and struggle to pass stool in even the smallest amount. My urination problems worsened, my erections weakened, and my sex drive has plummeted. I decided to drammatically increase my intake of fiber and it completely solved the constipation problem. I have had between 1 and 3 bowel movements every single day for the past week and a half or so. None of these are diarrhea-like though the consistency is often a combination of softer, loose (fresher) stool and what appears to be harder, pebbly, older stool. I have felt good about solving the constipation problem but I continue to have gas/bloating problems that come and go and the the urination/erectile dysfunction problems are continuing with the latter being the biggest concern for me right now due to just starting a new relationship.

I am kind of wondering if anybody has any advice. Since I had this problem before… about two years and was at that time diagnosed with IBS-C… I am pretty sure thats why I have. Where I am confused is what I should expect from here on out. I read that the erectile problems could be from straining of certain muscles due to the recent increase in bowel movements or it could be the movement of backed up fecal matter pushing against my prostrate bladder. The erectile dysfunction is by far the newest symptom (less than two weeks) and I can sometimes get up to 90% strength with the erection failing quicker than usual. Last time I had these problems, I didnt really know that I had IBS and it took a long to recover but I eventually did and exhibited no symptoms or problems for a long time. Any advice would be appreciated but I kind of wonder if anybody thinks that once the backed stool is completely purged if I can expect to see a gradual improvement in libido/sexual function/urination regularity or if I need to really get on the doctor to do something about it. I live overseas so I have to communicate with my doctor in a second language which is why I am seeking internet advice. If anybody has any advice or anything I am in you debt. Thanks in advance.