Hi! I'm a 26 year old female...
I came down with the wonderful IBS-D this past March and have been dealing with it everyday since. It HAS got better so there is hope. Like you, I have the, what I like to call the "morning rush". Right when you wake up after a good nights sleep, you have to dash to the bathroom.
I have been to 2 GI specialist, 2 family practice Dr.'s, etc. Had a colonoscopy, EGD, hydascan, ultrasoiunds, ct scans, etc. I tried calcium (it didn't work for me, but it does for some). Tried cholesterol meds...didn't work.
I started a powder form of "good bacteria" that I mix with water. It works WONDERS. Maybe something like that would help you?
Are you a nervous/stressed out type personality?? This IBS-D was a real eye opener for myself. I believe my IBS-D started because of stress and nervousness. RElaxation is key to getting better! Oh, and don't try to Dx yourself by what you read on the internet. That will make it worse. I thought I had cancer and everything else under the sun!
Start a hobby, take a waly, watch a good movie!