Your doctor is propably the worst i've ever heard, he / she has NO clue whatsoever. The half life is around 7-8 days if i recall right. You will feel ok for around 1.5 weeks at best, then like liquid shit for the rest of the month not to mention all the health issues that kind of use will bring up.
You simply are crashing, and badly. That is why you feel angry etc shit = way too low testosterone levels.
Change doctors fast or tell him that his protocol will only lead to serious harm. You have to do it immediately bro, you cannot wait weeks with this thing. Any sane doctor will agree immediately so finding replacement shouldn't be hard.
I'm speechless literally, it's just unbelievable your doctor would prescribe you 100mg once per month...
Read the stickies in here, you should take preferably 2x50mg per week, every week.