I'm really sorry for your loss mate, we nearly lost my mum through lung cancer earlier this year and then my dad died suddenly in June so my mum has been in a bad way. The doctors gave her some anti depressants as soon as my dad died to try and get her through it and I've been trying my best to keep an eye out for her and help with things. You need to speak to someone mate and tell them how you feel. It still hurts me now to think about my dad so it must be unbearable for my mum and everything in the house and her daily life reminds her of him.