when does sperm count drop? πŸ™ƒπŸ˜πŸ˜Ÿ

I'm 25 and hubby 31. 2 month ttc and pretty sure I'm not preg.friend is 26 and her hubby is 26. They got preg first try (per her). I eat so healthy and have always took care of myself? Idk why it's not happening. She told me sperm counts really drop in 30s but I think she said it to make me feel bad. She always tries to bring me down when it comes to ttc (oh, I was really fertile!, etc) does soerm count really drop that early 😐