I know some other people online who get injections and theirs wears off early too.

I don't know what your injection is, but if it's Haldol (for example), then you should ask for Haldol pills as PRN. However, if you already have Haldol PRN (or whatever AP you're talking about), then ignore my suggestion.

Also, it sounds like you're seeing a pattern in terms of injection effectiveness. Maybe you should tell your dr that you need more frequent injections or that you need your medication plan tailored to fit the lifespan of the injection? I would say get a journal (if you don't have one already) and write down your mood, feelings, and emotions everyday. That should give you an idea of how long the injection really lasts.