Urgent help please!

So, I have some selfharm cuts on my leg from a couple of months a go and I have to go to the doctors tomorrow and I have to talk to them about the fact that my periods are so heavy, painful and that I get really depressed a week before my period.

What I want to know is will they take a discharge swatch? I don’t want them to because I don’t want them or my mum to see my leg. I’m panicking so bad 😭

What will they do overall?