Oh hun, its sooo hard isnt it.
How is he today?
What inhalers is your little chap on? Have you had an Asthma review with an Asthma nurse at your surgery? If not, see if you can get one asap. She'll be able to draft an action plan to follow for when ds has exasperations so its a simple step by step as to what you need to do. Its a godsend for us with Maddie.
With Maddie, as soon as we are concerned, whether that be if she starts wheezing etc or coughing violently, or even if she starts with a cold virus, we increase her blue inhaler. Obviously dont do this for your little man before checking. Maddie ends up on 10 puffs every 4 hours and often that gets her through it but she goes down incredibly quickly.
If I was you, id get him seen by a doctor. If he was cold/clammy in the night, he may well be brewing a chest infection.
A course of antibs and pred should knock it on the head if thats the case.
As far as what the gp etc should be doing- As a parent, Id be looking for a review of his meds. You need to keep a diary of what meds he has and the symptoms he shows each day. This again has been invaluable in showing the professionals what helps dd and what doesnt.
Maddie has only just (bout 6months ago) been given a nebuliser in which she uses twice a day. She uses it for strong steroids. She has 'brittle asthma' which is terrifying to say the least. She doesnt use her neb for Salbutamol (blue inhaler med) as all the medical staff agree that if she needs this via a neb she should be in hosp. However, we have Salbutamol nebules as a back up in case the ambulance takes too long and she is desperate.
As for a hospital admission, I couldnt say hun.
As for the sleepless nights....I can empathise greatly. Its exhausting

If Maddie is bad she can be up ALL night. If she falls asleep her oxygen levels dip. Its scary and horrid.
I really hope you manage to get some help. Keep going back to your GP and if this continues ask for a referal to a hospital consultant. Alot of meds, the gp's are unable to prescribe. But I really think your first port of call is an Asthma nurse hun.
Take care and keep in touch
Mae.x
ps: sorry if post muddled....tiredness alert here too