Optician, GP or health visitor for a possible squint in a 7.5 month old?

[AreWeNearlyHairnet]

I hope I'm not stressing over nothing but I've been looking at recent photos of my 7.5-month old and I've noticed that one eye is often turned in.

I'd never noticed it as I was taking the pictures but it's definitely on several, most notably ones I took near bedtime or when he was tired.

I noticed at bedtime today too that the same eye sometimes seemed to turn in.

I'd like to get reassurance about this but should I ask my GP, go to the optician or ask my health visitor? (I haven't found the health visitors to be particularly helpful if I'm honest, I'm just concerned about wasting my GPs time.

Thanks!

Thank you everyone.
We went to see the GP this morning and he saw my son's eye turn in (he was due for a nap, so he was tired) so he has referred us to the orthoptist at the children's hospital near us for further tests. Fingers crossed everything is fine.