RE-POST on 16 week old with sleep probs

This is a re post for some futher advice. Since this post she has slept 2 nights for 8 hours, one wake to feed and then back to sleep for 3 hours. She is still waking after a half hour every time I put her down and I have to go in and soothe her back to sleep. Some fussing and crying when put down but easier than it was before the chamomilla. I am giving 30C, three pills 3x/day. When will I know she is stable enough to take off? How many days of sleep? Just want to make sure we don't make things worse! Thank you!!

Hello,
I need some help with my 16 week old daughter. She had been sleeping through the night (6-8 hours) until 5 weeks ago when we started her on somme medicine for her reflux (prilosec). Immediately that first night she began waking every 2 hours. We discontinued the medicine after 2 weeks (it was not helping and was likely causing her to have some stomach cramps) but she has continued the night waking.
She takes a few daytime naps but often wakes after 30 minutes and is very angry that she is awake. I often go in there, give her back her pacifier and pat her back to sleep.
Her hands are often cold and clammy, feet chilly, stools are dark yellow/brown and very sticky (she is only fed breastmilk). She gets mad when she has to go to sleep and fights it often until she passes out.
I started chamomilla 30c 2 days ago and last night she slept 8 hours...how long should I give it to her? I am afraid to get too excited and discontinue too early!
I also forgot to mention that she does have some reflux and often wakes with gassy bubbles.
We are desperate to get some sleep and get her some as well...thank you all ahead of time for your help!