Just found out I am pregnant and am a mess

So I have a 21 month old little boy & just found out I’m almost 8 weeks pregnant. Can I have some encouragement because I’m a mess right now knowing my son won’t have my full attention anymore because of the baby. My SIL just had her second born September 30th & her first born doesn’t want anything to do w her anymore since the baby’s home. I’m just a mess in a half