blood test

So, I'm in college but my parents still control everything and found out I am a frequent toker. Thus, I am now getti tested every month. Ok, I'm 5"9 and 120 pounds and a girl, so relatively thin, and I work out frequently. Could I get away with smoking one week on, and detoxing for two weeks...

HEy guys, i smoked on saturday night, its monday. I have to get my blood drawn tomorrow,it will be used to see if i have allergies or am hyperactive to certain chemicals. I have read that if it isn't a test for marijuana specifically it won't be found, but i was wondering what u guys...