Normal pregnancy anxiety? Plz help....

I just sometimes feel like something is wrong.

I’ll convince myself I have placental abruption or something is wrong. Any little cramps or aches I feel is something more serious. I suffer with anxiety in general...

Everything has been fine at doctors appointments and my 20 week ultrasound which was 5 weeks ago now but I just get anxiety and feel like something is wrong.

Is this normal? Or does it have some meaning behind it?