I think it's a very personal decision, when to tell a new partner. But for myself, my husband and I met online, we emailed and text each other a lot and I told him straight away because I felt he had a right to know what he was letting himself in for. I'm not the easiest of people to live with! I didn't want to leave it, us get close and then tell him only for him to freak out and end up heartbroken. I thought, if he likes me then he'll accept me for who I am and. It judge me for what I have. I wouldn't want to be with anyone who'd be like that equally so I'd have rather found out his reaction sooner than later. As it goes, he worked in mental health, so I guess I was like a home from home to him lol he wasn't bothered by it at all.
Go with your gut, if its telling you to tell them now rather than wait then do it, you'll likely feel better for getting it off your chest as it seems to be something you're worried about.