What does dry socket look like? I had a crown extracted two days ago.

I chose to r tract vs retreat. I had two abscess within 30 days. They day it was done , after the bleeding stopped I looked and I could see white and I did see a clot. This is day three and I looked at the area and there is white stuff on the top of the area. Is this normal? I have no pain except normal soreness after an extraction. I'm worried it's turning too dry socket and I leave for vacation in a few days. I am still taking antibiotics

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