nuvaring or arm implant??

Okay so I just had a baby in June and I had cholestasis during my last trimester so because of that my OB recommended that I not use birth control pills and rather use the ring. My husband is kinda against the whole idea of birth control aside from using condoms not for religious reasons but more for our future. He doesn't want us to have to have trouble TTC later on because of the BC. So naturally I went along with his request of not using anything. But last weekend we had some alone time from the kiddos and one thing led to another and in the midst of the moment we didn't use a condom (I was mid-ovulation). I took a Plan B the next day before 24 hours had even passed and as of now I'm assuming that everything is fine (fingers-crossed). Anywho this little mishap made me realize that I don't really want another child any time soon and that we should probably me more careful. I've definitely been thinking about using the nuvaring that the DR prescribed but I'm wondering if I use it and don't tell my husband that I'm on it, when we have sex will he be able to feel it?? I don't want to be shady but I know him and he's very set in his ways with this and he'll probably make a huge deal about it which I want to avoid. But I also don't want to risk anything. Should I do the nuvaring without his knowledge of it or just get the arm implant since it's just easier to kinda go unnoticed?