I've been where you are and can tell you there is hope. If you've been on your medication for two months without any improvement at all I think you need to talk to your doctor again and change to another drug. It can take some time for the colitis medications to work (usually 4-8 weeks) so if you're not seeing improvement then it's time to try something else.
Re: food. Have you tried a low residue diet? You can read about it in my share posts on this site or from Jennifer Rackley's share posts as well. When you're in a flare-up you want to be kind to the gut and not make it work too hard. This means limiting foods that are hard to digest or that have a lot of fiber - like whole wheat, red meat, legumes, corn, nuts, fast food, preservatives, etc.
Easy to digest foods that I suggest you try include:
white bread - lightly toasted with just a touch of margarine
white rice - naked, with just a bit of salt and maybe a little olive oil for taste
yogurt - find the natural kind without high fructose corn syrup, etc.
baked chicken breast
baked white fish
It's boring, yes, but giving your gut time to heal is important. Diet is a very important part of getting your colitis under control and you're the one who will have to get control of it. I also recommend you look into doing an Elimination diet - again, you can read my share posts on this.
It takes time and patience and perseverance to learn how you will be able to live with colitis. Plus, you have to actually accept that you have it and that your life has changed and will change even more. Everyone is different in how we react to this but once you figure it out you can live a good decent life.
Good luck to you,