Ah well that rules out the funny periods being due to miscarriage (I didn't want to say, but 1 in 3 pregnancies end without women really knowing they are pregnant except for their periods late and heavy).

I think if you think you can cope with having a baby you will! Of course you're going to worry as you get older, though my Mum had me at 41 and my sister at 45 and we are both fine.