Fiancee is not taken me serious ugh

So my periods are irregular... I know my cycle and it takes forever to ovulate I dont like normal.. Well he says he wants a baby and that it will just happen when it does... Seriously no it wont u have to ovulate he doesn't understand that hes like well if we dont get to it today maybe next week Lol no... Hes either not taken it serious or dont understand🙄🙄 and we work so its hard to whenever we want.. But we been trying for years so hes frustrated but so am I.. We dont have sex when I ovulate so thats y I keep tryn to get him to understand like theres certain times! Sorry for the rant im exhausted and frustrated