because you are manipulting your HPTA with drugs and causing a roller coaster
these drugs are not toys, this is why i cannot stand forum guru's who give advice and always tell people to hop on hcg and SERM's like they are candy. they will cause fluctuations in your HPTA which are temporary, and when you stop taking them you simply crash again
only YOUR OWN body can truly recover. this is why you should run a complete pct and stop listening to these guru's who don't know the difference between a screen pass and screen porch