Does anyone else feel their fertility is going?

[Countrydeb]

I am worried about this as before i had last bub we used no contraception for 3 years....I thought i was finished fertility wise fue to my age and weight....Now i am considering trying for a girl and wondering if it will be possible due to short window available.....My period was always regular before bub and seems to be same after so wondering if i am not releasing eggs....Has anyone else gone thru this.......