Apologies if I repeat what has been said but I wanted to reply 'pronto' cause man do I know how you're feeling. Massive hugs!

DD was exactly the same. She had silent reflux too, was diagnosed at 10 weeks by her Paed. He prescribed Losec immediately and we noticed an improvement in 24-48 hours and she was practically 'fixed' within a week!! Try Losec or Zoton if Losec doesn't work. They're both prescription only and the suspension options (liquid) are much easier to administer although a bit more expensive. Zoton didn't work for DD, our GP tried that. Her Paed said he doesn't even bother with Zoton, always prescribes Losec first.

We never bothered with a thickener (I predominantly BF anyway) so I can't help with that.

We also saw a chiro for a couple of months and that helped heaps! DD was a vacuum delivery (she was posterior and stuck so had to be turned by the OB) and our chiro said her neck was incredibly stiff from the delivery. It was any wonder she only slept facing the one direction! The chiro helped with her neck and reflux along with a couple of other things. They were brilliant.

I gave into the lack if day sleeps eventually and let DD sleep in the sling. She'd happily sleep for 3 hours attached to me so I'd either shop or watch TV! I used a Bubba Moe sling and wore her in the heart position so cradled into me with her head next to my heart.

We bought a Hushamock Hammock which worked really well for day sleeps (like amazingly well!) until she went through the 20 week Wonder Week. I believe it helped with her reflux though so definitely look at hiring one to try it out. Amby hammocks are usually easy to get hold of.

Ironically DD slept wonderfully at night but her Paed said that's actually quite common with silent reflux babies. So I was getting full nights sleep from 9 weeks onwards which certainly helped a bit.

I continued randomly trying DD in her cot for day sleeps and then magically around 6 months she slept for 3 hours one morning It blew me away! And that was the beginning of good day sleeps so all my worrying about being stuck wearing my child forever was for nothing. She sorted herself out eventually.

I hope that gives you some ideas and hope. It does get better and you will get through this. Know you have loads of support on BB