Feeling Miserable 😢

This should be such a happy time, newly pregnant and have been trying for a LONG time, but I feel horrible.
It's made me realise how much I already do (married and have a child who is 9) and work full time in a high-pressure, secure environment as well as everything around the house and all in between.
I've felt rubbish the last week and my Husband has been no help whatsoever and with him being the only one who knows I'm pregnant, it's so hard.
I'm already panicking about far in the future - how am I going to keep sane being out of the house for 12 hours a day? Plus general life with a 9 month old, a 9 year old, all the housework, the cooking, homework etc 😳 
Feeling stressed 😔 sorry for the rant, but thank you for listening xxx