Did anyone lose the plot after they had their first lo?

I just want to know if Im the only human out there that lost the plot completely after having there first child. At first everything was fine then I started hearing voices having hallucinations, having out of body experiences you name it it was happening basically I was losing the plot I lost my mind completely. Did anyone else go through this or has this just been me? I'm still going through it but it comes in pangs and I say inappropriate things that I think others are trying to harm my little one and I convince myself I have hard evidence and it causes problems I cry sometimes because I thought I was getting better but it comes out at times, So am I the only one that's been through this?