Okay I need help because I’m really dumb .. I’m 16 and I live in California La and I have a blood test today cause I donated blood a week ago and they told me I have low iron so I need to go today to the doctors butt yesterday I forgot and I was dumb and my friend asked me to do a hit of the pen( marijuana) but I only did 1 hit and I remember that it was today and I’m flipping out cause what if in my blood count test today says I have THC AND THEY TELL MY PARENTS .. do they tell my parents ? Are if thc gonna pop up ??? Plz help I need to know everything ... plus I’m really confused cause people are saying it will show or it won’t