Worried sick

So I went today for a couple of moles to be checked to dermatology. 
She checked those and all ok. I’ve had a halo mole on my back for years and was last checked Nov 2024. 
The doctor just kept saying I don’t like that a few times and has arranged to get it removed asap. 
Thing is I had a liver transplant 11 years ago so I’m on anti rejections that can cause skin cancer. I’m always out of the sun too. 
She took a photo and it’s not symmetrical and it’s multicoloured 

My mum passed away from melanoma so I’m worried sick. I care for my 22 year old autistic daughter. Her dad loves her but I’m with her 24/7 and she’s struggling enough with life. She knows about this and hidden away in her room. 

I don’t know what to do with myself now. Just got to wait for an appt now