Gender Depression

Has any mamas out there experienced this? This is my 4th pregnancy. We lost our 1st and were blessed with 2 Boys afterwards.. My oldest being 2 going on 3 in December and my youngest being 11 months. Getting pregnant this time we were really hoping for a girl, my Husband & I even thought and were super confident it was a girl.. I just had this sense of calmness (if that makes sense lol & doesn’t make me sound completely crazy) knowing it was a girl.. well fast forward to yesterday.. we went into our ultrasound so confident & left feeling so disappointed and just incredibly sad. I was a mess, I couldn’t contain the water works! Don’t get me wrong I love this baby and feel very grateful but this being our last pregnancy I really wanted my girl. I feel like such a horrible mama & I just have no clue how to snap out of it. Literally EVERYTHING makes me sad.. trying to find a name for him, look at baby clothes for him.. everything!