I Need To Know If I Should Go Into The

I need to know if I should go into the emergency room I used to be a size 18 now I am a size zero and I eat all the time I'm not trying to lose any weight I'm tired all the time I can really go up and down stairs I have a horrible pain in my right side come over my kidneys are there does not want to go away and I have bead like bump under my skin by my throat neck shoulders and back and under my chin