Overwhelmed with regret

My apologies in advance, this is gonna be a long rant, I am having such a hard time. Idk if it’s ppd/ppa or not. My baby is almost six months old and I’ve regretted his name from the second I did it. I’ve tried to let it grow on me and take my time to not make another quick decision I’d regret (if I’d change it) and I couldn’t get my husband on board and then it just started to seem to late and now I just feel like I’m stuck with it. But I have the hardest time with it.. I’ll go a couple days feeling like no he’s just meant to be this and to try to get over it and then I just break down about it all over again. I’m completely obsessing over it unintentionally. All day long I try to call him his name (Caleb) or I try to get Cal to stick or even try Bear or Cub because I’ve tried to do “Caleb the little bear cub” to come around to it and be growls like a little bear and stuff.. but Cal is an actual acceptable nickname, but feels wrong for Caleb since the sounds are different. I’ve never wanted to call my child solely by a nickname, I like full names. But I just hate his whole name combo and never wanted it, but for some reason just felt so mean to not let my husband have the name he picked because he wanted them to share initials and a middle name and he’s liked the name for a long time, but I just hate it and his middle name is the same as my uncle and cousin’s name.. just none of it is what I wanted and I’m so mad at myself for letting it happen. I had my husband compromising on Waylon Joseph (first name I wanted and his middle name choice) but it seemed too close to our daughter’s name (Gracelyn) and he said he didn’t look like a Waylon and said he’d just find a nickname for him.. which is what I should’ve just let him do then. I was so overwhelmed and emotional and looking for someone to tell me what to do and most people on this app said he looked like a Caleb and that the name blew Waylon out of the water and it sounded like wailing, etc.. so I went with it and immediately regretted it and just can’t seem to get the hell over it already.. I’ll feel like I’m doing fine (even though I never call him by his name in public or in front of people, only when I’m by myself trying to get used to it) and then this all sneaks back up on me and I just completely freak out and fall apart. He’s starting to get wild and all I keep thinking is to call him wild wild waylon or wild man Waylon and it’s messing with me. There’s nothing cute about Caleb, I hate the sound of it, I can’t believe I did this. Cal seems like a little cowboy to me, which I like, so I’m trying to just come around to that.. but then sometimes I feel like it just sounds like cow and is weird and just doesn’t seem like a natural nickname for Caleb since it sounds like cay at the beginning, not Cal. So it’s not like how I usually call my daughter by her full name and then sometimes Gracie baby or something, ya know.. I’m just going crazy. I’ve tried counseling, but it doesn’t help and I don’t see how it’s gonna help me get over this overwhelming sense of regret 😩 idk what I’m looking for.. thoughts on the nickname, advice, just someone to understand and tell me I’m not crazy.. please just don’t push me down any farther 😔