Advice?

I’m currently 37+5 and a FTM. Baby girl has been very low since around 34 weeks. I’ve had all the usual pains down there but the past week I’ve also been having a pain in my upper stomach- like a constant ache and it also makes me feel sick. The pain is quite unbearable and makes me feel like I just need to lay down. The pain isn’t in my ribs it’s in my actual stomach/ around where my afterbirth is. Did anyone else experience this and know what this is? I feel like it would be pointless to go and see the midwives at the hospital but it’s the second time in the past couple of days I’ve got this pain.