You aren't going to notice much from 10iu/week. You need a dosage of 3-4iu per day to really notice anything.
Rather then HGH, I would use the SARM nutrabol instead. Nutrabol is an HGH analogue that signals the pituitary gland to increase HGH output. I would say it's equivalent to about 3-4IU of HGH per day. It is also legal to use and an oral. You can also be certain of what you are getting. The vast majority of HGH on the market is fake. I recommend sarms1.com as a source for nutrabol. Nutrobal (Mk-677) Growth Hormone - Evolutionary.org
HGH is very hard to detect in blood tests. That is why it is so commonly used by Olympic athletes. I would save your money on the blood test.
Getting your hands on good quality Human Growth Hormone is a real problem right now, not an easy endeavor at all here guys. Only a couple of reliable places still left.