I felt the same way, but in the end I asked for another opinion. We ended up seeing a couple of different Paediatricians and then in the end got a referral to see a Paed. Neurologist. My son did end up having an MRI and LP. It was terribly invasive and just horrible for him, but they did rule out some other really serious problems that they were concerned about due to symptoms.

It's great that the medication is helping with the migraines! I now understand why your son's doctor hasn't been more aggressive about that.

I'd still see a Neurologist, but that's just me. They have the experience with the neuro exams and perhaps can pinpoint exactly what is going on and why there is the one sided Babinski and yet strong knee reflexes.

After I wrote the first message, I went away and thought of something I'd meant to ask you... how is his gait? No toe walking or anything unusual with his gait? You did mention the hamstrings but I just wondered.

All the best to you and your son.
I hope you come back and let me know how you get on.