Hi Ali,
I feel the same as you, I didn't realise how many different types of BC there are. But from what I can see it sounds like it's all very treatable. After googling information, I too am trying to stay away from searches. There are too many scary stories which is not what any of us need right now.
I have only recently been diagnosed with triple negative myself. I had a 35mm tumour cut out in a lumpectomy and all my lymp nodes. Now booked in for a masectomy next Friday as there was cancer still in my breast. I definitely couldn't have got through this whirlwind of diagnoses and operations without my breast care nurse. They have so much information and are able to give you perspective on your situation.
I agree it is difficult to go from super healthy and then facing up to ill health. But trying to think positive about getting through this hurdle, I feel is a good start. Sad to hear about your husband being ill too. Hopefully you can surround yourself with family and friends to be able to support you both.
Take care