HELP ME PLS!

I have an amazing 2 year old son. I was happy with staying with just 1 child especially because my birth experience wasn’t the best. Even after birth I went through a lot which left me with a lot of anxiety. Well I’m currently 22 weeks pregnant with my 2nd son. I can’t lie I am terrified I don’t want to go through the same thing! Most of all I don’t want to die and leave behind my boys! Im not trying to be negative but these thoughts run through my mind a lot especially the closer I get to giving birth. What can I do? I feel so bad and guilty about these thoughts but I can’t control my feelings.