hello experts!

I hoped someone might help me.

I'm living in the UK and months ago booked a flight back to Canada for July 2016. However in the meantime I've become pregnant and my due date is within 2 weeks of my flight date. I wanted to change the flight to go later in the year but the cost of changing the flight is more than the fare was (I got a good deal, haha).

Do you know if air Canada are likely to waive the change fee, considering the circumstances, or would I be wasting my time?

Thanks!

MH