Hello Lisa,
I have a few thoughts as I read your post. I am sure others will jump in and maybe have other ideas, advice, too.
This is so frustrating and very difficult for you to see your son suffer like this and then he must be cranky from not getting naps, etc. It is a viscious cycle.
Will your Dr. allow Mylanta before he goes down for a nap? Hefty doses help sometimes at least for a bit to get him to sleep. Coats the esophagus.
Has your Dr. suggested another med to try? There may be inert ingredients such as lactose fillers that he may be having issues with and not the med itself? There are many many other meds out there to explore with your Dr. But, sometimes these Docs are set in there ways and are non-believers that this can be the case .. BUT I have seen many many thru the years post that they have issues that disappear with the right med. There are other meds out there (not sure if they are all FDA approved for infant usage, though so you must discuss with your Dr but when the risks outweight the benefits they will oftentimes use the med) .. Zantac and other supressors are a thought .. they can be given up to 3X a day with Mylanta inbetween if your Dr. agrees ..
A Pedi GI may be the way to go at this point .. this is there speciality and they are more liberal with the meds working with you.
How are his poops? Constipation can cause worse reflux.
Silent reflux is awful. It can do more pain/harm then regular bcz it isn't coming up and out but is making the esohpagus raw. I'd cry out in pain too! You are your son's advocate .... I am so glad you found this community to speak for him so we can help you with some ideas.
UPRIGHT SLEEPING SEMI RECLINED: There is a tucker sling that many use. It is used in hospitals and helps .. http://www.tuckersling. I'm not promoting this or trying to sell this item .. it is a type of item I refer to so you can see how it works. It helps keep the reflux from coming up. Discuss with your Dr. if it is ok to prop up the mattress (from underneath) so the mattress is semi-inclined for naps. Mine would nap in a semi-reclined stroller and I'd stroll him from room to room with me. Infant carrier worked wonders as well as a swing not moving in semi recline position.
One last thought on the weighted formulas. It is thickened to help slow things down but oftentimes it is too harsh for the baby to tolerate the solid foods. Any indication of more gas since rice has been added? The added gas causes reflux flares, too.....
If you go to the health pages at the top of the right side and click it on and then go to an entry about STARTING SOLIDS ... this may help you, too as your baby is at that age and it can get worse or get better when solids are introduced.
OR here is the link for you to the Starting Solids Page:
http://www.medhelp.org/health_pages/Gastroenterology/A-Mothers-Experience---Starting-Solids-with-a-Reflux-Baby/show/102?cid=182
Hope this helps!
Cheryl
Mom to 3dd's 17, 15, 10 & ds 9, who was my reflux king