I started DS on solids at 14 weeks. He was a big baby and I just seemed to be feeding him constantly, though never for very long. So I followed some (dodgy!) advice and gave him solids. He did actually take to it quickly, although I must say he still had several (small) milk feeds a day. Solids made no difference to his night time sleeping.
He is now 3 and has suffered from very severe croup and asthma from 8months old. He gets the croup every time he catches a cold and we usually have to take him to A&E in the middle of the night . This time of year is a nightmare .
Of course, he may have been like this anyway, but I can't help but feel the croup and respiratory problems generally are because of early weaning. There is certainly no history of asthma in the family.
With DD (6.5 months) I held off weaning till a month ago. I knew it wouldn't make a difference to her night time sleep and so we left it. We started gently and she quite likes her food now but I'm certainly not stuffing it into her the way I did DS. I'm hoping she doesn't develop asthma as well.
I think with your first child you're always looking to the next stage in their development, wondering if that will be the key to something or other. I enjoy DD's babyness so much more through just living for the day.
Could it be that perhaps your baby isn't that hungry at each feed as you're feeding so often, and therefore he's just snacking? My DS certainly did this - there's no harm in it for them, but it's not that convenient for you! If he is snacking, perhaps trying to settle him with a dummy, or some water, or just distracting him by going out or whatever could help? Then if he's really hungry for each feed, maybe he'll take more and be more settled.
Sorry bit long winded but I just feel if you;re in doubt, do nothing for the time being. Ride it and see if things change - babies do go through funny phases and often in a week or so they're back to their normal patterns.