I can't say if its HD as ds was diagnosed before things got bad but he did poo but loose and almost like leakage..
Hmm..sounds similar to how dd was. She had poo backed up so much that she also went over a week without poo'ing. She was and still is on movicol.
My experience of movicl is that its the best available to start with,I would give your ds the maximum dose and d it at a time when he needs to go or do nothing. Be prepared ...
dd took upto about 6 sachets before she finally went, movicol means they have no choice but to go.
Dd's poo was so old and backed up with what she passed was almost brick like.
She to also leaked poo, think of it like an over flow. The leakage is what can't be contained anymore. Its not the childs fault.
Also, to add. Your ds may be not eating much as his tummy is full of poo and he's uncomfortable with it.
Once the hard poo is passed it will be easier for your ds to go. Reduce the movicol slightly and do this for a few days. He should be able to go naturally and try and get him into the habbit iykwim.
It tok dd around a week after such an episode to get regular and now only has movicol when she hasn't been for a day-2 days.
Now.............your ds may have HD BUT you really need to see your gp and ask for a referral. IME HD displays itself with a distended tummy.
You really need to get medical advice and help. Prehaps if you are getting nowhere with the gp's then either change to another one or I wuld pay your local A&E a visit.
I so know how distressing and hard work it can be having a lo with bowel problem. Having gone through what we have with ds and then to have bowel issues with dd I have many a time been very low. Im lucky thought that I have the support (maybe not always medical support [hmm[) but dh has ben there when I needed to sound off.
Let me know how you get on and feel free to email me x