Baby name anxiety

Someone please hell out to relieve my anxiety. I had a baby in May and never had a name for him but absolutely LOVED a different name that started with an R. Well instead we named him something else that starts with an E & I’m having absolutely HORRRRIBLEEE anxiety over wanting to name my next child that before someone else uses the name that I know, but I’m also freaking out that I’m not guaranteed to have a boy. I just need words of encouragement or advice to help ease my anxiety. Idk what to do but it’s making me go crazy during the day and not sleep at night😞