Am I doing the right thing?

[seaurchin2016]

I posted ages ago about a toxic sister - she has now cut herself off from the whole family.

My husband died suddenly of cardiac arrest last year and I have had a difficult time coming to terms with this. Then my dad died in hospital of sepsis 3months later. My other sister helped support for 2 weeks and then said we should be okay and stopped helping us. So, my daughter and I have been trying to cope on our own. We have no other family or friends so we are all alone.
I went to visit my other sister at a time convienient to her and after half an hour her husband told us to leave because I was talking about missing my husband. We left.I said that his way of asking us to leave was rude. Since then my mum has moved in with my other sister but this sister has stopped me from seeing mum. Mum now has dementia. This is the last I heard as my sister has stopped me going to her house. She says that I disrespected her husband. My toxic sister has kept away and now my other sister has done this.
I can't get any news of my mum's health or even see her. She could die and I wouldn't know. When my dad died I found out on the internet because my other sister posted photos of dad ill and then dead. I couldn't find out when his funeral was or where so I couldn't go.
So, now its just me and my daughter. We are lonely and only have each other - we spend days crying. Mental health have been useless in my area. We have medication but that's it.
Why is this happening to me and my daughter?

So your two sisters have been low or no contact with you for a while. I assume there is a long history to this. You say that you and your daughter are lonely, but I think you have to accept that your sisters are not going to fill that void. Unfortunately your mother can't now either.

Many people don't have family, but they create a support network with friends and neighbours. Do you have friends? Aside from your sisters, are you good at connecting with people and forging relationships?
Do you work? If you have free time what do you do?
It sounds as if you have to look to yourself now to create a life and forget your sisters.

I'm not good at making friends as I'm very shy. Even though my sisters are not very nice to me I still love them - I don't know why. my two sisters have fallen out with each other and no longer speak to one another. Dad committed suicide and mum has dementia- she lives with one of my sisters. I would like to see my mum before the dementia gets too bad but my sister has banned me from her house. She banned me because I was upset over my husband having died. I loved my husband so much and I didn't expect him to die suddenly.
I'm in a mess.