How do i get my anxiety to go away?!

I had a miscarriage 2.5 years ago and now currently 24weeks pregnant with my rainbow baby but i cant shake the feeling that something bad is gonna happen and im gonna lose him. If i dont feel him move for a while i think hes gone

I go into every doctors appointment trying to prepare myself for him to not have a heartbeat. I just have a horrible feeling and a sick mindset that hes not gonna make it alive earthside. This is my last baby and i want to be able to enjoy it so how do i get these thoughts and feelings to go away.

Is it normal to feel like this or am i crazy! 😩😥