Please help, I can no longer do a natural BM and need advice on how to fix things

So I have had a hellish 3 months with colon issues and constipation and after being prescribed lots of Movicol for an impaction back over Christmas, this all led to some psychological issues, and now I have done some damage to myself that I hope I can repair. Any help or advice would be much appreciated!! So... Long story short, dad died of colon cancer in December, serious attack of IBS-C and an impaction soon followed because of the stress and poor diet. After impaction was cleared using LOTS of Movicol and Senekot and then enemas, my mind was fixated on keeping my colon clean in fear of what happened to my dad happening to myself.

SO here I am 3 months later feeling more rational and with a clean bill of health after many tests. Now I want to just function normal again and any attempt I have made has just failed. I just CANNOT, no matter what I do, go for a BM without an enema. At first it was great as it really eased the constipation and I could stop taking laxatives every day, but after some weeks I started feeling depleted and drained and frankly tired of doing enemas. I have actually tried to kick the enemas twice as my colon got quiet irritated recently no doubt from daily enemas,I just went 3 bloated days without them and had no natural movement at all, not even an urge to go, and today I had to give in and I did a 1.5 litre flush to get things going. I was usually doing about 1 litre a day, sometimes every second day and twice a week I could do the 2 litres. I'd be happy now to do it once a month. But, I just don't know where to start.

It was very frustrating, walking didnt help, diet didnt make a difference, and the 2 litres of water I drink a day didnt do anything either. Prune juice only makes my tummy gargle and I have tried all the usual high fibre foods to try get it going. Nothing!!! My last NATURAL BM was December 27th.

IS there any way back for me now? Can anyone offer me any advice to try get things back to normal as some days I get so down over this. I'm only 29 and feel my whole world now revolves around my bowel movements (or lack of.) My GP could not offer anything constructive and I literally do not know where to turn for help.

Please help me...