4month almost 5 month old with baby reflux need help!!! ASAP

I've written into the forum before. I am aware of Nat Phos Nux Vomica Joe and everything.

I need advise please no rants.

My son was diagnosed with silent reflux at age 3 weeks.
we've had him on prevacid since 6 weeks old (Dr. suggested). It worked for a while but he got terrible belly pains. Starting 2 months we've been adding cereal(dr. suggedted too) to his formula as well. First we started with oatmeal and it made him gassy. Then Barley which he did great with but they discontinued it :( so I asked the Dr. and he said try Multigrain. We started that about a week before the flare up. He gets a tsp per ounce.
I finally took him off prevacid about a month ago (at almost 4 months old). i did it cold turkey.
I used Nat Phos 1/2 tabs 4x to help for 2 days and then just Chamomilla 1 tsp the 3rd day.
He did great for about 2 weeks. I mean an angel baby good.
Just these past 2 weeks the Flare up began.....
10/31 to be exact
I was driving in my car with him in his car seat he began to cry and I stopped at a gas station to console him in the back. I gave him his pacifier and he screamed and suddenly a huge goo bubble came out of his mouth he arched and more clear goo came out and he began choking. I freaked and I got him right out and calmed him down. Thanks goodness he was ok.
The next day(Friday) he did ok and Saturday became a little irritable.
Sunday 11/3 he was the worse!! Would not go down for longer than 20 minutes and crying from when he woke up.
Monday 11/4 I got him right on Nat Phos as I did the first time. I knew it was reflux.
Not to mention he is teething like a mad man.
Monday 11/4 I gave him 1/2 tab 3x He did ok but some waking out of sleep to scream.
11/5 Tuesday 1/2 tab 4x a day
He did ok but he had some stomach pain too pull in feet and crying. I feel Nat phos gives him stomach pain. Still wanted to be held and irritable.
11/6 wednesday 1 tab 4x Nat phos 1tsp of nux vomica 30c 1x He did great in morning but got irritable toward end of day whinig with stomach crunching. Hence why end of day Nux
11/7 Thursday 1 tab 5x 1 tsp nux v 2x Irritable toward mid day and set off by little things. Pooped major from Nux v napped better though.

11/8 Friday Nux v 1x Nat phos 1 tab 4x Still irritable but can be consoled. Still liked to be held.
Saturday 11/9 I just gave him Nat Phos 3x 1 time 1 tab 2x 1/2
Better but slightly irritable less stomach issues.
Sunday 11/10 I gave him 1 tsp of chamomilla and 2 tab Nat phos
Better mood just liitle flare up of reflux and irritable behavior with gulping reflux. Good Naps but constipated

Monday 11/11 2 tsp chamomilla 1 tab Nat Phos
Great baby and not too irritable. Slept amazing with naps

Tuesday 11/12 2 tsp Chamomilla 1 tab Nat phos
Great Naps and mood great slightly irritable just after last feeding of night though so gave nat phos because spit up. Pooped afternoon.

Today he started to spit up and became irritable late morning and needed to be held all day I gave him 2 tsp of chamomilla this morning and after arching and spit ups I have given 1 1/2 Nat phos so far. I first episode of arching and 1/2 after 3 pm feeding. He seems better now he is sleeping finally but he did not take longer than a 20 minute naps today.

Overall I have noticed he started to do better with mood toward this Tuesday. I am not sure if that is due to the Chamomilla or not.
I do think the Nat Phos works but too big of a dose I feel hurts his tummy.
The chamomilla I think worked with his mood and tummy issues and also he is teething like crazy ..hands always in mouth and irritable. I think the teething contributed to the reflux too.

My questions are .... are these the right remedies to be using?
Is it ok to use both if they seem to work?

He has always managed to sleep great at night 9pm-7am straight even with flare ups. But I notice he doesn't nap with flare ups.

I am thinking of maybe switching to rice cereal too maybe the multigrain is too much?

Please some opinions.....