I think I’m pregnant again!!

I am 18 years old with a 10 month old daughter and I think I may be pregnant again. I am on the contraceptive pill but I fell pregnant on that last time. Now I can’t bring myself to having a termination as in my last pregnancy I was having identical twins and unfortunately lost one! I don’t know what to do, does anyone have a young child and another on the way? Helpppppp