Can I get some advice.

So my husband and I have been trying for 3 1/2 years and we've done fertility before and tried our selves but maybe it just isn't meant to be. I have some health issues that maybe causing me not to get pregnant. Here's the background of it all. We are buying a house next month. And his mom is certainly unable to work so she's moving in with us. But she wants a grandchild. My question is should we go through fertility now or wait. What do y'all think? 

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