Oh Late I'm sorry. Crossing fingers for you it's not AF.
I know that feeling far too well Munro. I second Pickle's advice. But also could you do a gradual return? I've just been dealing with my HR team after being signed off for 2 weeks last month & they've been really helpful so hope it's ok for you. Make sure you're really gentle and kind with yourself. 
Pickle Yes I'm doing iui in Denmark now. It's pretty much the same cost after shipping the magic potion to the UK (well once you take the level of motility into account). And at least this way I know it basically made it to the right place.
Bought my flights for next month last night.
Ended up buying two different return dates because I wanted to be safe but for an extra £8 felt like it was worth it! Got a few things I need to sort this end but getting there!