Will i feel better anytime soon? depressed?

hi all im a little over 29 wks pregnant, and im terrified, not of giving birth, im terrified something will go wrong, i had 2 mc last year (both before 16 wks) and im petrified something will go wrong still, i feel plenty of movement, but im in pain from spd, which has me worried, a suffer from anxiety and depression severly i dont know if that is part of the reason why i feel terrified, the thing is now birth is approaching im getting worried i will wake up one day and my baby wont be breathing if i do manage to have her. help, its getting me down that i cant relax, i havent enjoyed any of this pregnancy due to the worry, and i had post natal depression after my son, and im worried i will get it again if i dont start to feel positive about things but i cant