15 weeks today...but....

Hey everyone, I’m 15 weeks today, but I’m not feeling pregnant anymore because the morning sickness has worn off. My back is aching and I can feel my belly stretching but I feel I’ve lost that pregnancy feeling ☹️ does or has anyone else felt like this?

I have a scan at 13 weeks and everything was perfect, saw heart beat etc...

Not having another scan until 20 weeks should I be worried? I haven’t contacted midwife or Dr yet as I feel it just may be where my hormones are taking over my body and head!