TTC 8 months 😩 now

Hi guys! So I'm 30 and husband is 32.I have 2 boys already aged 3 and almost 11 years old.It's been 8 months now and I'm still not pregnant! We had him do a semen analysis with his urologist and all that and everything came back completely normal.I've been keeping track of my cycle and ovulation and still nothing.At this point I'm almost ready to give up but I know I will regret it if I do.I'm blessed to have 2 great kids already but I really want one last one ( I'm hoping for a girl but, my husband says he "only makes men" so I won't get my hopes up lol).I guess I'm just venting but, has this happened to anyone else? I just don't understand why it's been so difficult and I've never had any issues so could it be possible that within the last 3 years my body has changed that much?