Hello medfag here, the only person that was close to diagnosing you was the anon above.
Symptoms mentioned really make it seem like you have SIBO, which could lead to IBS if not treated correctly.
Root cause of this is that you have a poor diversity of gut bacteria, likely caused by your excessive alcohol drinking in the past and certain normal bacteria strains have gone uncontested and have taken over your digestive system causing a breakdown of excessive bacteria and leading to bloating.
Probiotics like the anon mentioned above are good, you also need to get on a FODMAP diet to rebalance your gut health.
I wouldn't recommend antibiotics because those usually nuke your digestive tract and will essentially just reset the whole process.
Try to walk as that's also good for gut motility.