as you gave the detail about your problem,it seems that there is infection in that area.did you take your medicine before and after the treatment?and one more thing, did you follow all the given instructions given after extractions like-do not smoke,do not touch that area again and again,do not take hard food from that side for at 2-3 days etc. properly i will suggest you please go back to your dentist
as soon as possible and go for the complete examination done.and please follow all the given instructions properly.till that time do warm saline gargles and do not press that area again and again.
nothing to get worried.
Dr. Gunjan Gupta