I hear you! It is a little weird. It's possible your PCP ordered it, though I haven't heard of us doing that. I've worked there for a while and every year we have a non-zero number of joke orders, which is annoying but comes with the territory of offering sexual health resources to the public. One time we had some students at a Catholic school order a condom packet to be sent to their teacher; that was fun 🙄

Editing to add: I spoke with my colleague who runs the program and he said PCPs shouldn't do this without your knowledge. If you want to talk to someone in our office, send a message to GetCheckedDC@dc.gov and he'll do his best to help you figure out what happened.

The DC health department runs a free mail-in HIV test kit program called GetCheckedDC. If the return address is 899 N Capitol St, then that's where it came from. If you didn't order it yourself, presumably someone else ordered it on your behalf. I won't speculate on why someone would do that. There's no harm in taking it, or in saving it for later, but if you really don't want to take it you can just throw it away. Source: I work there.