Missed crystal meth shot in wrist 2 days ago didn't know until i had done whole 50cc shot right after site swelled 2 golf ball size + severe pain 12 hours later whole wrist swollen 2 egg size. now whole arm swollen 2 grapefruit size excruciating pain?

Go to ER for immediate evaluation and treatment. Consider rehab.

You need immediate medical attention as life threatening complications are likely affecting your arm, have a long term plan also for your meth use.

Highly likely you developed both local bleeding and an infection. As mentioned, this does require emergency medical attention. Hopefully, this provides some insight of the potential damage that crystal meth involves, and you have the good sense to enter a drug abuse rehabilitation program.