Rough fillings

So I just had four fillings done, they were both touching/facing one another and now when I floss the floss starts to fray. I don’t have any pain, I can feel the both of my teeth are a little rougher but nothing that’s irritating or causing pain. I have a feeling because the cavities were facing one another it’s very difficult to smooth it out completely, but I’m not really sure.

How smooth should fillings be? Even if they’re touching one another- is the fraying floss an issue?

Thanks!