But, as with most things in fatherhood you soon realise your worries are just frankly ridiculous!
What it has been has been a voyage of discovery and learning, of sleepless nights and fun-filled days.
Nothing in life can prepare you for the actual job of fatherhood, you can learn lots about babycare but nothing prepares you for the emotional hit of holding your own child.
What have I learned? A load, both about myself, about patience and the joy of baby watching. Come on dads, we have all done it, just stopped and watched how our little ones go about their day.
Jacob is just a delight, especially now at six months where he is babbling away and developing a really funny personality. His favourite trick at the moment appears to be looking all sad at either me or his mum.