Feeling guilty for being off work sick

So I’m 21 weeks and 2 days pregnant and I’ve been off work since Friday. I’m constantly feeling guilty about not being at work because I know my colleagues will have to work harder etc.

Anyway, I’m off sick due to being highly stressed and having panic attacks. I know I’m bound to be emotional due to obviously being pregnant but I’m constantly crying at work over the stupidest of things. I think I may have a slight bit of anxiety too. I will be phoning be doctors either later this afternoon or tomorrow to see if I can get an emergency appointment.

I’ve self certificated myself and I’m on day 3/5 that I’m allowed. Is this something I will get signed off work for or not?

Thanks in advance.