What Causes Headache And Shortness Of Breath After Injecting Methamphetamine In The Neck?

Hello. Yes i have a very important question. I let someone shoot meth up in my neck and i i think he did it wrong because i had a big head ache and just by making my bed i get shortness of breath and im always so tired. Im scared to death. Its been about three weeks. I havent done it anymore.