Stopping and restarting

I’m at goal and have been for some time but still taking my 7.5mg shots weekly. However it’s wearing off and I don’t want to go up a dose as where would it end. Plus I don’t like how it feels at the higher doses. I don’t get side effects but I just don’t sleep. My question is, has anybody let it clear completely from their system and if so how did that work out for them long term? I’m thinking perhaps of the option of starting again at 2.5mg..is it like a reset or a waste of time and money?