Signs of postpartum depression?

Well I got pregnant unexpectedly at 19. It was a very stressful time for me. Me and my bf was constantly arguing back and forth abt getting an abortion or not. Now I’m 32 weeks and I’m starting to second guess if I should’ve just went through with it. I feel so bad because I have no feelings towards the baby at all and I know this isn’t normal....a part of me wants to be super excited and filled with joy bonding with my unborn child. Idk if it’s just because I’m just scared to become a mother or if I’m scared what my future holds for me and my child and how life is going to turn out. I need advice!!