Next scan in 8 weeks

Hi Mummies! I had my 12 weeks scan 2 days ago. So grateful that all is good. Baby is active tossing here and there. But, my next scan is at 20 weeks, in April, which is 8 weeks away. Is it normal? I have a Dr appointment at 16 weeks, but no scan being scheduled. Will everything be okay by then? Do any mummies go for a scan elsewhere like private clinic just for a peace of mind? Or am I just being paranoid for worrying too much?