Somethings missing

My husband and I recently bought our first home and I got my dream job at a doctors office. I should be on cloud 9....but somethings missing. A baby....we have been trying for over 3 years with absolutely no luck. I’m putting on more weight and I’m not happy. I cry when I look at the empty rooms and my fur babies help me through sometimes but then I think “If we had a baby we could take places and do things with” but no luck. I feel so alone and it hurts to look at my husband and hear him talk about having children one day. He would be such a great father 😞 I don’t know what else to do I’m at my wits end.