Haven't had chance to read all replies so if I concur with what's already been said I'm sorry. I am a mom to 3, 10yr - Autistic, 6, and 4. My husband and life partner since I was 15 died Oct 13 (can't say last year yet) to Cancer having been told he was all clear in May.
He was diagnosed originally when I was 7 months pregnant with our youngest and I can only imagine how you must feel with a new baby, although I contemplated it enough. It is a horrendous time I know, I miss him constantly but I am coming up to 5 months along this terrible road next week, and can say in all honesty 3 months is when reality really hits so thats why you feel quite so overwhelmed right now.
Counselling REALLY helps me although it would never have been something I would have done before this. Cruse are amazing, but if you really can't face going (maybe someone could sit with the baby in the waiting room) Macmillian have an online support forum for breaved spouces and the people there truly know what you are going through, and will offer advise and support 24/7.
It can be hard to talk to friends and family as time moves on they resume their normal lives and I sometimes feel his name is a Taboo word (eyes roll - shes off again sort of thing) so please consider it. I feel we're like something from a Dickens novel and dread the day I hear my youngest say my daddy died when I was 4. Have had photo cushions made for all the children and they cuddle them at bedtime - just a thought when your DD is a little older.
You don't mention much about the illness but you've lost the carer role in your life too. You'll have to work through those distressing memories before the good ones can get through, but they will, so do be kind to yourself, it truly is the crueltest of blows to endure.
Wishing the strength and courage for the days ahead. LIZ 123 is my signature if you come to Macmillian online. XX