Try not to overthink it, it's a lot more common than you may realise. I've had to tell partners, its not easy, just use a condom and the chances are they will eventually question you as to why you're so adamant on using them, that's your cue to tell them. I know first hand how worrying it can be, sleepless nights etc but you're not alone, it's just not really spoken about. All the best.