Could you call and ask them if it’s something they would help you with? You might just need to get the stitches cut to be shorter.
I know the last time I had stitches I noticed them more the last few days they were still in because a part got loose, but the ends were still held in so I had the stitches freely moving around, but still being held by the gums. I was able to move them around so they were less annoying and staying busy with work tasks helped me focus on other things. One morning at work the stitches felt even weirder and I noticed a few minutes later that they were actually no longer attached to the gums and I got the stitches out of my mouth.