Potential IBS?

Hello! 24M. I got a stomach flu on Christmas Eve and threw up but that only lasted for a day and I felt fine again until New Year’s Eve, I had diarrhea and threw up again and since then I’ve had constant constipation and an upset stomach. I went to the hospital on January 2nd when my symptoms were the worst and they did an xray to confirm stool was backed all the way up to my colon and that was likely casing my upset stomach. They told me to take restoralax and after about 4 days I had a bowel movement. Since then I have taken restoralax once a day (a full cap for about 3 weeks and now I’m down to half a cap) and I have added in a fibre + probiotic daily gummie and have been producing a bowel movement every 2-3 days. My whole life I’ve never had stomach issues but I’ve always pooped maybe once or twice a week on average. Since taking the restoralax my stomach issues have gone down a lot but I’ve had excessive gas and burping. The gas also has a very strong sulphur smell. Would this be something to follow up with my doctor on or should I wait a little bit longer since it seems to be getting better everyday? Thank you! Edit: i think it’s also worth noting that I had very minimal bloating at the beginning but have had none since about January 10th