I'm sorry. It must be a hard thing to go through.
I agree with the OPK's though. If you are buying those AND pregnancy tests... yeah, it gets pretty pricey. I just rely on my CM. However, do whatever makes you feel comfortable. Spend your own money on OPK's if you want to use them. That way DH can't get upset about it. That's what I would do anyway. Put aside $20 every month just for your OPK's. I have no idea how much OPK's typically cost, since I don't pay attention to them. I would think $20 would be enough.