Can bereavement make you sleepy? I've lost my father recently, and all I feel like doing is sleeping!?

Absolutely! It is totally exhausting to lose someone you love, particularly your father. Be gentle to yourself right now - you need lots of TLC (tender, loving, care). In time you will get your energy back. Mourning can feel like a full-time job. It's better to do it now and really feel it so that you can move through it. You will always miss your father but the sadness will settle to the bottom of your mind and you'll be able to get on with your life again. You'll never forget your father -- his death will become incorprated into your life. Right now you're making that adjustment.