Lump under armpit?

I know that this isn’t a doctors office but at this point idk what to do, Around thursday last week I developed a lump under my arm and it has only gotten worse and bigger it hurts like hell and it makes me feel sick like it give me a sick feeling, I also have a headache and I have chills I have cried 5 times today... show more I know that this isn’t a doctors office but at this point idk what to do, Around thursday last week I developed a lump under my arm and it has only gotten worse and bigger it hurts like hell and it makes me feel sick like it give me a sick feeling, I also have a headache and I have chills I have cried 5 times today over this and I’m just done...I think it’s red but idk someone please help
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