Should i be worried?!

I felt a lump on my armpit in the morning it it hurts😩 i don't have a picture because you can't see it but i feel it like it doesn't look like a pimple but i feel a lump like ball probably the size of a grape or blueberry not sure exactly hurts to feel well! Any thoughts? 
P.S yes i know yall are not doctors to tell exactly but idc i just need advice/opinions 

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