Hello and welcome to the forum. It's really impossible to diagnose anyone through pictures or over the internet. We are glad that you have a doctor's appointment set up. One thing you can do is call daily each morning to see if they've had a cancellation to get in sooner as this does often happen. Here is quick guide for judging something you fear is melanoma with regards to a mole:
A is for asymmetrical shape. Look for moles with irregular shapes, such as two very different-looking halves.
B is for irregular border. Look for moles with irregular, notched or scalloped borders — characteristics of melanomas.
C is for changes in color. Look for growths that have many colors or an uneven distribution of color.
D is for diameter. Look for new growth in a mole larger than 1/4 inch (about 6 millimeters).
E is for evolving. Look for changes over time, such as a mole that grows in size or that changes color or shape. Moles may also evolve to develop new signs and symptoms, such as new itchiness or bleeding.
Since you have had the change in the mole, it is important to be seen. Call and explain this to see if you can get in sooner and they may accommodate.
Here's more information on https://www.mayoclinic.org/diseases-conditions/melanoma/symptoms-causes/syc-20374884
Please let us know how the doctor's appointment goes and we'll be thinking of you.