8-10 month sleep regression

Johanna.

Help! My second son had terrible reflux but finally around 7 months we got it under control and we sleep trained him. He can put himself to sleep, if he woke at night he would settle himself back to sleep until last month when his first teeth came in. I think he became use to me coming in and giving him Tylenol because even weeks after his teeth came through he’s still waking. Sometimes he will cry and fuss for hours. I caved the other night and gave him a bottle. Today I called the doctor and they told me to sleep train again. I’m afraid it will go on for hours again. Tell me this will pass. Any advice?