Is it normal to have some scabs from a bee sting?

I got stung by a yellow jacket bee (I think-the bee was pretty big and black and yellow striped), back on Friday. I was given initial first aid treatment at the pool where I got stung, but developed a large rash on my wrist, which has yet to go away. The itching had been VERY intense at times, and I admit, I did scratch it on two or three occasions as it was really deep feeling itch. I used a basking soda and water paste off and on for a few days to help with the itching, as well as taking a homeopathic treatment, Apis Mellificia to help reduce the swelling.

Since then, the swelling and itching has dramatically diminished, and the red rash is gradually fading. However, I've now noticed some slight rough feeling/scab areas. Is this a normal part of the healing process, or was it due to me scratching that area a few times? Also, does this rash indicate that I may be allergic?

Thanks!