I’m very concerned that you didn’t have some therapy after the birth and adoption of your first baby. Even when giving up the baby was the right thing to do, it is not at all uncommon for women who have surrendered a baby and not had therapy to have a “replacement baby” to ease the sense of loss and longing.
This is too big a decision for you and your boyfriend to make on your own, especially since you do not have the resources to be independent. You probably do need to involve your family. But before you do, I strongly urge you to have a few sessions with a therapist who has experience with adoption issues. Your local Planned Parenthood health center has specially trained staff who can talk with you about all of your options. (See more at: https://www.plannedparenthood.org/learn/pregnancy/pregnant-now-what). The therapist will help you clarify what you want to do and how best to involve your parents.
I wish you well.