Same thing happened to me. A big lump on my glute from some Sust-450. (Yes I know it's supposed to be 250 but this bottle said 450.)
So I thought, "Hey let me pin my calves to make them bigger!"
My calves got huge but I could not walk straight for days.
Then after forgetting the pain in my calves, I thought, "Let me pin my biceps."
My biceps did not get as big as I thought they would but the pain to just brush my teeth was tough.
So look at this lump as a gift my friend and try pinning your weak spots