While trimming a bush at our new house, I was stung this week by 20 very aggresive bees or similar insects. One person told me they were Yellow Jackets, but they left their stingers in me and Yellow Jackets don't lose their stingers. My son in law looked into the bush and said there was a huge mud nest. These insects are still very aggressive and we need to get rid of them but we don't know what they are. Can anyone help. I repeat, they lose their stingers.