It sounds like you have an abcess which likely started as a sebaceous cyst. The material that you are seeing is the sebaceous material (like a badly plugged gland). Anyway, it needs to be evacuated if the area is going to heal.
You need to see a doctor in the morning for evaluation. They may opt to use a scalpel (after anesthesia) to make a small incision so that it can drain properly.
In the meantime, you can keep applying warm compresses to the area to encourage drainage. Of course, if you develop any fevers, worsening pain or other concerning symptoms, you may need to go to the ER to get this taken care of right away....
Well, the dark marks are likely scarring from previous pulling or pick out the grown hairs. Some people have a tendency to scar more than others. You can see a dermatologist- are you are in 3 weeks. There are some skin lightening formulas (prescription) which may help. Laser is also a possibility. Some dermatologists have the right lasers- or they can refer you to someone who will. But hang in there- you are having the derm appointment in three weeks...
Sometimes when you shave, you can introduce bacteria under the skin and into the ducts- and then you can get a small cyst or abscess. As well, when the hair grows back, it can tunnel under the skin and cause the same thing. Just keep the area clean, do not shave any more. Wash with warm water and soap twice daily and wear cotton boxers so the area can breathe..