This nurse pissed me off so much

Honestly I absolutely can't stand the nurses at my hospital. They complain that doctors don't respect them yet disrespect the CNA's Phlebotomist, and any other tech. So I was on pediatrics and was drawing blood for this 19 year old boy. He was special needs so they put him on peds. After this nurse gets me and says "733 has been needing labs since 6am!" I said I didn't have that label. She said "Can you draw them". I asked how old they are. She said 10. I said I can't draw 10. I'm not signed off off pediatrics. I can only draw 12 and up. She said what's the difference between a 10 year olds vein and a 12 year olds vein. I said that's not the point. I'm not signed off. I can't draw them. I can get in trouble. She decided to tell me that I'm a half ass Phlebotomist and they've been waiting all day for labs and it doesn't matter that we are understaffed because they are too and the least I can do is draw these labs. I got pissed I said "Ma'am you have 7 patients. I have a whole hospital and I'm trying my best. If I stick them and something goes wrong I wasn't supposed to be sticking them anyway. They're not gonna fire an RN. They're gonna fire ME!' She kept talking shit and I walked away!