Well, if you think your kid is lazy then perhaps you've already figured that something is 'wrong' or different, it just might not be the same thing you thought it was. I know there have been times when I thought x was wrong, when it turned out to be something else entirely... but there was *something*, if that makes sense.
There's no harm in getting another opinion, anyway.
Don't know where you live but if it's like where I live you will wait a few months for a developmental paediatrician's assessment (you might need to sell the house to pay for it too!). So book in now and if it gets closer and you don't think you need it, cancel the appt a month out.
I always say, listen to your gut instinct. We went to a GP who gave us a developmental paed referral, it took 6 months to see the specialist but it was well worth it. GL!
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