Mirena insertion

Hey guys I’m getting the Mirena inserted this upcoming Monday and I’m very nervous. For one I EBF and I’m worried about supply but I’m 14 weeks PP so I’m hoping since my supply is stabilized I should be okay? . And I’m nervous about insertion. Any advice? I think it’s probably the best option because I don’t want another baby right away and I got pregnant accidentally with this current baby. I’m just really worried. 😭😭😭 I’m a baby lol.