PPA second pregnancy

Hi,

After my first I had PPD and PPA. I had lots of intrusive exaggerated thoughts of like all the ways I could accidentally kill my baby- that do I loudly falling down the stairs when I just happened to be walking past them in the hall; her falling in our septic tank somehow..😒🙄 like anything and everything and rationally I knew it was ridiculous and dramatic.

I’m now pregnant with my second and I’m already thinking all the bad scenarios for my 3 year old again which had stopped for the most part for a while now, between the 2 of them like my oldest doing awful things to the baby, etc.

Any advice anything to curb the thoughts other than telling myself it’s irrational