Should I hire a attorney, or trust my PO to help?

You absolutely should not trust your PO to help you. Hire an attorney or ask for a Public Defender.

The prosecution must prove your guilt beyond a reasonable doubt. Does this one fact prove it? It is hard to say without hearing all of the facts...

This is something that should be left up to the discretion of your probation officer. Since the PO will not help you, you can file a motion...

I want to hire a private attorney, but i already have a public defender...

I would encourage you to make a quick call to your public defender to make them aware that you have hired a private attorney. It is common...