Right I understand my title depends on the person but IBS-D seriously is stressing me out...
I work full-time and use public transport alot, buses and trains. Every day is extended by half an hour to an hour due to (possible loo breaks) to and from my destination. My life is seriously about routing my voyage to ensure I know a toilet is not far from me, and if so, I will take a longer route than necessary to include one.
I start my day with a cup of coffee or tea and a couple of biscuits. I use the toilet, I wash shave then use toilet again, half an hour before I leave the house I take loperamide hydrochloride. I then reuse toilet again before I leave the house.
During my commute I take another loperamide hydrochloride in the form of immodium instant.
I tend to use toilet once or twice during travel approx twice a week.
Some days I'm totally fine, and others I'm in a severe depressed anxious state.
I hardly eat anything at work for fear of needing a number 2 and I eat nothing at home after work for fears of diarrhoea in the night or morning before work.
I say no often to days out because of how I feel, and my partner thinks sometimes it's in my head, and I do agree that the more I worry about it, the worse I am, but in 25 years of suffering as I do, I would hate to experience a bad episode of suffering and not being able to get to a toilet.
I love the wrong foods too much and they disagree with my tummy, ie curries pizza onions vegatables fruits the list is exhausting.
I just don't see what else my life holds except constant pre ahead planning of my work commute.
I regard myself as healthy despite my food intake of predominantly biscuits tea and coffee (done this now for 25 years) I do eat other things, but only if I'm on a day off the next day or on holiday. But the day I eat other things I tend to spend the best part of that day sat on the toilet to get rid of it.
I'm at my wit's end.
I have experienced similar and an currently exploring my triggers....the first change I made has made the most impact and that’s dropping the milk in my coffee (I don’t drink tea) I think it’s something about having a milky drink first think that sets me off. Worth a try?? (Or use a milk alternative such as almond or soya milk?)
Knew the milk would be a big trigger
I can't stand black coffee but gonna try it from tomorrow morning and see if that helps 
Try rice milk - it tastes the most similar to normal milk IMHO. I’ve served it to unknowing friends and family and they’ve actually complemented me on how nice their coffee/tea was etc. Although, it would be better to stop the caffeine and switch to decaf too...
As others have suggested as well, give FODMAP a go, keep a food diary and perhaps look into taking a probiotic. All these things helped me.
It’s miserable at first to stop eating all the foods you enjoy, but after a while you don’t mind so much as you feel so much better. Nothing is foolproof, but these things should help.
I get anxiety movements too - right before I leave the house. I am now good just forcing myself to leave the house and telling myself it will be Ok. This doesn’t always work of course, but if I can achieve it even once a week, it’s a win as far as I’m concerned.
Good luck with it all!
I quite agree missymoo. My dietician currently has me on a lactose free, onion free, wheat and garlic free diet and toilet visits are reduced from 3 to 4 toilet visits (every morning) from 7am when I wake to 8.30am when I leave for work commute, down to 1. This was noticeable improvement after just a few days of following the NHS diet. Try the lactose free milk for couple of weeks and see if bit helps. Good luck