Thanks for all the input ladies.

I'll have a good read about all the mirena stuff when I have more time (on phone ATM) so thanks for the suggestion.
It's so hard to know what to do! I wish there was an easy solution.
We have talked a lot about the snip but dh is unsure about the pain/side affects etc. Has no problems with the finality of it though.
Keep the suggestions coming, I'm all ears!