Jorja,

I think it's only natural to feel the way you are. Being your 2nd time, you do know what your in for, I was the same, I'm sure I'll worry when I fall pg with my 3rd too.
My 1st was a 9 hour labour, posterior bub, gas, peth and an epi that only half worked, 3rd degree tear and lost a litre of blood; I was constantly wondering how my 2nd would be and was a little scared.
However come labour day with DS, I was in labour for 2.5 hours and only had gas as things came on quite quickly, no time to worry abut it all, I was holding my bundle b4 I knew it.

Do you do yoga, I found that helped settle the nerves and relaxed me.