...
How am I to stop the government from assassinating me?
One way would be to get some smart and trustworthy people to help you rig a deadman switch that will reveal to the public what the government doesn't want them to know in case you aren't around anymore, and then make the exist of that switch public...
But didn't you said that it didn't need to be you? Why would the government kill someone else and spare you if they are after you?
But really, are they actually after you, or is it just a disease making you see things that aren't there?
Sure, you gotta be careful, "just 'cause you're paranoid it doesn't meant they aren't after you" and all that stuff. But you also need to keep yourself grounded; in most cases where people are acting weird like you are, the problems are all in their head (i don't mean made up, i mean like something is wrong in their brain). Keep your eyes open both for what you're afraid of and for signs your mind could be betraying you. Seek professional help, but remain careful just in case in the end it turns out you were right all along.