Anyone will agree that lying about an std, and then having unprotected sex and transmitting it is a scumbag move. But calling this rape is kinda fucked.
If somebody convinced you to give them 5 dollars without force or intimidation, and you decided to give them 5 dollars, did they rob or steal from you? Just because you weren’t in the mood to fuck, but did after some persuasion, doesn’t make it rape.
Obviously if there was some kind of entrapment/force/intimidation then that is a different story, but it doesn’t sound like any of that went down.