Please don’t judge me..

Hi. I’m 22 and happily engaged. I have a 14 month old son. My fiancé isn’t his biological father. My fiancé and I still live separately with our parents, yet we see each other everyday (we work for the same company) and every weekend. I just found out I am pregnant. Looking at around 5 weeks. We aren’t ready to have this baby. We’re planning on moving in together soon, going to Europe with my son and family in December and getting married next year. We’re both struggling very hard with this decision but we know that abortion would be the best option right now. We already need help from our parents to help with my son as we do not earn a lot of money. We don’t want to make this second baby their responsibility too and we cannot afford to have another baby right now. We also have so much goals we want to reach within the next year or two. We want to have a child once we’re living together, married and ready emotionally, mentally and financially. I read that when you’re this early you can get a pill that will basically flush everything out. We agreed that if the abortion has to be done surgically (if I’m too far for the pill) then we won’t go through with it. But I’m sitting with my mind at 50/50 here. I know bringing this baby into the world right now isn’t a good idea, it would be unfair to the child, to my son and to our families. I also know for a fact that my mother would be very disappointed and extremely mad. I really need advice. Are we making the right decision?