"are you guys planning to ever have kids?!" 😒

Er
So I'm 27 going on 28 and my husband and I have been ttc For around a year and a half with no luck..both of our family is constantly making comments like "when is it your turn?" "When will I be a grandma?" "You're next i hope?"  I'm sure we all know all the forms of "when are you having a baby?!"..they don't understand that we HAVE been trying and WANT it more than they even do..I don't want to be like "we've been trying and failing thanks for making me feel like shit" but it also breaks my heart every time they say something. I don't want to come out and say that we have been and want to because I want it to be a surprise when we do finally get a BFP.. not just "expected". So I guess my question is, how can I go about voicing how I feel without actually saying that we are trying and stop saying anything because we have been struggling for a year and a half..