It's always the way! Usually with me it's my oh that suddenly has loads of work on just before ov time so it's hard to get bd'ing, or we seem to have a silly arguement a few days before, so the stubborn me has to try to be less stubborn and forgive him for the sake of bd'ing!
I hope you feel better soon and manage to get some bd'ing in, have a nice honey & lemon always seems to work for me. Good luck xx