Hello
I am just coming off a flare like yours, it started in Dec just before christmas. I can't say I did anything special but I feel your pain with the urgency. I promise it will get better but it may take some time. Personally I am not too fond of how much mesalamine you are taking. I was on that much (asacol, enemas and suppositories) and it gave me pancrea*** (although my gastro disagrees) but I removed 1 of them (the enemas) and it went away.
I have found that asacol take a bit of time to kick in. I had my recent flare becasue I stopped taking everything. I found that what the Gastro had me on was too high so i lowered it and life was grand! No D and everything was nice and formed. When the flare started I began slowly with like 1 asacol at night and 1 in the morning, and then inched my way up. I am currently taking 3 and 3. Things are settling down and much much less urgency.
But it has been at least 6 months