So I have questions

How do I tell my GP? Do I need an appointment?

My parents would be asking me why I need to see GP.I don't want to tell them It is because I am depressed,having suicidal thoughts, & that I am not motivated to anything.My mom is wondering why I am getting bad grades, & why I am not doing my work. I don't want to tell it is because its due to depression.

I have had urges to SH,have contemplated suicide, & have had a plan.

If I tell my GP this, what will she do?