I just got tested for anemia will it show that i smoked weed 7 days prior?

No. Test for weed use is usually done on urine. Marijuana is a psychoactive drug and will mess with your brain and damage your lungs among other injury. MJ users are called stoners for good reason. Quit using it while you are ahead. Wish you good health!

Testing is need specific, meaning the look for what the doc is searching for info about. Each test requires different equipment and time. As a rule, there is never an all-in-one test. In most states, it is illegal to test you for drugs unless you sign a consent form. When you are doing a pre-employment physical, the process assumes you consent for a drug test when you apply for that job.