Recovery after Wisdom Tooth Removal.

Hello, My lower right wisdom tooth was impacted. It was 90% inside the gums & almost 25% inside the next tooth. Eventually bacteria formed & infected the adjacent tooth as as well. When severe pain starts in 2nd molar, I went to dentist she suggested root canal in 2nd one and removal of wisdom tooth. She did RCT in 2nd & did temporary filling and with the help of a surgeon, she removed the impacted wisdom tooth. After surgery, they said the case was deep and near to nerve but all is well. Its been 1 week, swelling is almost gone just a small solid lump is left and I have almost no pain. Other teeth pains a little sometimes I guess that's the part of recovery. She suggested regular warm fomentation and salt warm rinses. I have two concerns. One, seems like removable​ stitches which she suggested are stitched to my cheeks as well and I can open my mouth to only 50% capability till now. Are these two things normal & what to do to speed up the process?