I understand as I'm having my 5th baby too. But God wouldn't give you more than you could handle.
I think it's normal to feel that way. Question things at time. But just remember how excited you were when your first was born, you will be that excited and fill all over again with that much love. It's not that you are having a baby with a 6 month old, you are having a baby in 34 weeks and that will make your 1st child over a year old. Millions of women have done it and so can you. I have two children that are 13 months apart! I felt the same through most of my pregnancy. I hated being pregnant, I never felt a bond while pregnant. After she was born it all came to me, all the love. They are 4 and 5 and I am so thankful I had them 13 months apart. Best oppsie I ever did in my life.They are best friends and have so much love for one another. It was hard, but twice as rewarding. Let yourself feel the way you want to feel, but know there is light at the end of the tunnel. Also will the morning sickness, remember you only have about another month of it, it will get better too! Talk to your doctor about something to help with it. Good luck, and hang in there, you are going to be fine. Congratulations on the new baby!