Third pregnancy and stressed

Dont know why Im even writing this. Well i have 2 kids already had loads of plans and this pregnancy happened accidentally. Before you come at me i.was way passed ovulation and i guess i ovulated later than expected and im here now. I cant seem to get excited about this pregnancy my youngest is 13 months old and dont sleep well im exhausted im nauseas. I had to cancel a holiday that i waited for for a long time just overall depressed. Im 9 weeks hopefully i will feel better soon. Did anyone felt this way with third child or in pregnancy. Im trying to be happy because its a blessing but its hard. Needing some pep talk