Scared.... Stressed.. Ugh

Elizabeth
Please No Judgement... I'm 19 years old will be 20 shortly after baby comes, & We just unexpectedly found out that we are Pregnant with baby #2! My DS is 9 months old so he will be about 17 months old when baby arrives! 
When I got pregnant with DS my mother (mainly) acted like I absolutely wasn't ready & having a baby was the worst thing to happen to me, which was 100% wrong! 
My DH has a full time job plus is a part time college student & I work part time making pretty awesome money!
We have a house, A car (2 In a few months) , lots of nice things & my son is VERY VERY well taken care of... I know financially we are going to be just fine after baby #2 (I'm not so sure emotionally lol)
But, I almost feel like not even telling anyone because I don't want the criticism & Judgement... This is supposed to be such a happy & joyful time & Even though we where not expecting #2, It happened & For a good reason! I truly believe that God makes no mistakes & He definitely doesn't give you more then you can handle!!
Anyone going through something similar?? 
Any advice on what to say to them?