I'm almost 20 weeks and idk my baby's gender 😫

Wanda • blessed to have my little family💘 I love my husband and baby boy 💗I won`t change them for the world 🌎
I still don't know my baby's gender and I want to start decorating the baby's room but ugh I hate the fact I don't know it and my stomach don't even have shape like if I don't have a belly it all goes to my hips it only comes out at night / heart rate :140 and measures 19 centimeters  I am desperate to know what should I do ? 😫