How do you know when to stop trying to conceive...

Background

I’m 24 & my husband is 30, we are so lucky to have a almost 2 yr old daughter... we’ve been actively trying for another baby for 8months (I totally understand we haven’t been trying for anywhere near as long as a lot...) it took only 2 cycles to fall pregnant with our daughter...

today’s Mother’s Day & I’ve woken to my period.. obviously want a baby but it’s getting really hard to go about life knowing we are still not pregnant... (especially being constantly reminded we should have another baby by everyone)

How do you stop trying..& how do you know if you should stop...