I am a 25 year old male. I have had normal bathroom habits for my entire life, other than the occasional short lived diarreah or constipation...until a month ago.A month ago I got constipated. I tried everything to get better with no success. I went to the doc after 10 days and he prescribed me lactulose. I took this and became regular again within 3 days, so I discontinued the med. Shortly after i started having lower left abdominal pain and then the constipation came back. Now I am constipated with occasional diarrhea. Constant throbbing pain. I have trouble sleeping due to the pain and discomfort. Lots of gas and bloating. This has been going on for a month now, I'm thinking about going back to see the doc again this week if it doesn't improve.After a lot of internet research I am starting to think that I am developing IBS. Is this how it typically starts?And as a side note, I did have appendicitis about 5 years ago and had it removed, so at least I don't have to worry about that anymore!