Worries

Charlotte
Hi everyone, I just thought i would ask as I am happy yet terrified.
So i am 6 week pregnant and I have been trying to conceive for about 6 months thought had it in my mind for the last few years. So I am so happy for t finally happened.
But every now and then I get the overwhelming feeling of "Can I do this?" "Am I doing the right thing".
Has anybody else had this? And is it normal?
How do you get passed it?