I’m uncomfortable? And afraid?

Hi so I have an interesting situation w my relationship. I’m in this polyamorous relationship and I love them both sooooo much. I got a yeast infection two months ago and I got the proper meds and it went away and hasn’t come back. Since the yeast infection, every time we have sex my vagina is uncomfortable when he penetrates or she uses her hands/a toy; it doesn’t hurt it’s just uncomfortable. I’m also afraid that he’s going to accidentally slip out and go in the wrong way. It’s so strange and this has never happened to me before. I’ve been sexually active for awhile and this is the first time I’ve experienced this. My partners all know about this and we’ve tried to do things to fix it and I don’t know what’s wrong. Does anyone know anything about this stuff??