Ds2 is 4months old. He hasn't slept for more than an hour in one go since he was 2months old, except in his car seat/buggy (where he can manage around 2hours max). He is ebf and feeds frequently day and night. He's also very big (born on 95th centile, wears 6-9month babygros).
Other than this he is a very chilled out, happy baby; gaining weight and meeting milestones; smiles and laughs a lot; doesn't have trouble falling asleep (just staying asleep!); feeds well and his nappies all look they way they should.
For a long time we blamed a bad (cough and cold) virus he had at 2months old, this seemed to make him very congested and wake him up, we then felt he'd fallen out of the habit of being able to settle himself after a sleep cycle. A couple of weeks ago we tried extending the gap between feeds in the night so dh would rock him every other hour and I'd only feed him every other hour. We managed to get two hours between feeds (sometimes even sleeping for the whole two hours). However he now seems to have another cold and be congested and sniffly again, so he now won't settle for long periods at all (less than an hour in fact quite often). I'm now thinking we can't keep blaming the virus etc and starting to think there must be a medical reason for his wakefulness.
His older brother ws very similar re naps (wouldn't settle for more than an hour, sometimes only sleeping twenty mins ) and night time sleeping (not quite as bad, but pretty bad). However he was also a generally less contented baby, quite unsettled and needed holding upright most of the time, windy and had lots of explosive nappies then finally had bloody stools aged 5months and was diagnosed with a cmp intolerance. I cut out dairy, eggs, beef and soya, and gradually reintroduced them (first to my diet and then, as he weaned, to his). He now eats everything and grew out of all his dietary problems (is now 3).
I'm starting to wonder if ds2 has the same problem, only the manifestation is respiratory rather than digestive? I've mentioned to dh and my family and they are dead against me cutting any foods out. But it took MONTHS to get ds1 any medical diagnoses, I would if I thought ds2 was suffering similar, want to start moderating my diet straight away. (I will talk to GP and HV, but I don't know that they will have much advice... No one seemed to be able to help much with ds1's sleeping really.)
Would I be an idiot to start eating differently for a couple of weeks and see what happens? Feel really upset knowing that everyone will be against it :-( but I can't let that be a reason for not doing it iyswim.
Also appreciate I may be a little over anxious/quick to jump to conclusions because of what happened with ds1 which was very distressing at the time.
Know this is not technically aibu, but any advice would be appreciated.