As we don't know what kind of a fee you are talking about we can't hazard a guess.

None of us are going to be able to walk you through law school in a couple of paragraphs. Your lawyer will know what to do.

You have no grounds for a lawsuit IMO. You should seek therapy for your overreaction.

The state has an interest in protecting you from abuse even if you don't want to be protected. It is up to the state whether to prosecute.

You can not sue them for an allergic reaction.

That is a decision for the judge to make and depends on all the facts.

If his parents say it is ok. it is their call.

You will spend thousands on lawyers and wait years for a resolution but yes you can.

You call the police.............................................

It is impossible to speculate to whom a court might award custody. You need your own attorney to advocate on your behalf.