Lost a child any ideas of including him in the ceramony

We lost our son in April 2016 he was born stillborn at 38 weeks the cause is unknown he was perfectly healthy and so was i. We had planned on getting married after he was born but recently got engaged. I cant seem to be happy and all i worry about it if ill be able to get prego again cause we havent been trying. We want to wait to try again until after the wedding since were getting married in vegas. Idk if anyone has gone through this id love to hear from u. We want to think of ways to incorporate him in our ceremony any ideas? Id greatly apprciate prayers as i do not have any living children before my son i did have a miscarriage.