Anyone struggling to sleep?

Michelle • Hi iv 3 boys and would like a girl. I`m 36 now and all my friends think I`m mad. I can`t bring myself to tell mum we r ttc she will hit the roof, but I`m so broody I don`t care xxx
I'm so tired but have insomnia, never had this with my other pregnancies worried something is wrong. I toss and turn all night, get hot have a wee. Try to lie on my stomach my normal way of sleeping but can't for fear of squashing baby plus my breasts are heavy and make it difficult. Is this normal? If I don't sleep am I doing damage to my baby? X