^ Sadly, it does seem to be pretty normal, judging by what I read on various forums and from other autistic people I know around here. As far as I can tell, there is simply nothing autism-specific available in most places through the NHS or GP referrals, even if an NHS unit did the diagnosis (it was them that were supposed to provide my OT, but as ever, funding cuts mean that they can't provide this any more.)
If you haven't done so already, the best bet for getting some support seems to be to get an assessment of needs from local adult social services, preferably with the support of a NGO disability advocacy worker. If deemed as needing support, what interventions are available depends on exactly what service providers are available locally and how much funding the SW can justify for each intervention. You are also usually expected to contribute towards the cost, with the intention that this would come from claiming PIP benefit, which is a whole other kettle of fish.
The disability advocacy service was the key thing for me. Without them, I wouldn't even have known what options were available to me, nor had a clue how to navigate the bureaucracy. They're becoming a dying breed unfortunately, but I heartily recommend you try to find one if possible. Good luck!

Thanks for the advice.