Need advice

Stacie • 21 and have a beautiful boy named Freddie born 13/09/2016
Please don't be horrible. 
Me and my fiancé found out we are pregnant and we were really happy but now I worry about money. He has a good job and I work part time as I just finishing my university degree. My mum says she worries about us with a baby but I never really worried until now. 
I don't know what to do, I told my fiancé maybe we should look into adoption I really don't want to do that I really wanted this baby but I don't know what to do. 
Any advice would be great just to put my worrying mind at ease.