Am I ready?

My husband and I are young, probably the youngest couple my fertility specialist has cared for..I have pcos and needed his help through medications like Clomid, femara, and ovidrel. Well it finally worked! I am currently 6 weeks along and just had our first ultrasound. For some reason I'm starting to second guess myself, are we really ready for this? We wanted it so badly and now that it's here I'm nervous and can't stop over thinking. Is this normal? Obviously we are excited I just don't want to seem like I'm this awful person for feeling this way.