OP I’m so sorry for your loss. I lost my mum in March and I’m still grieving. It really does take time and especially so where the death is sudden - you don’t have time to prepare and that’s hard to handle because you’re left with so many things you wanted to say and no way to say them.
I found that writing a letter to mum helped enormously. In it, I expressed what she had truly meant to me through the years, the important times in our lives that we’d shared, how much I loved her and how she would always be with me in everything I did. If you can find somewhere quiet, just take pen to paper, or even type it out on a laptop or whatever. I didn’t write it all in one go either - I just went back to it and added on thoughts that came to me. Whenever I feel low, I read through it again and everything that she meant to me is right there - it’s comforting.
On a practical note I would really recommend seeing your GP. The suicidal thoughts are concerning and you need to tell your GP you’re having them as soon as possible. The grief is raw and painful at the moment, but there are some short term meds to help you through this period. Talking therapy/grief counselling is also enormously helpful, but you’re very early on in the grieving process and you may benefit more if you wait a little while - might be a good idea to mention this to your GP as there may be a waiting list.
Grief isn’t a linear process OP. Some days you’ll feel better than others, and some days you’ll be right back where you started. The important thing is one foot in front of the other, day by day and be kind to yourself. Losing your mum is a significant life event and you need to allow time for yourself to process the loss.
There is an excellent, supportive website called WayUp. Link is below. It’s mainly for those who have lost a partner, but there are many posts from those who have lost other family members. I found them such a source of strength and support when I lost my husband a few years ago, and I revisited the site after losing mum. That support was there and I felt I was among friends - there’s no pressure and everyone is in various stages of grief so there’s lots of advice as to what to expect and how to get through each stage.
You will get through this OP. You can’t imagine it now, but it will get better, the grief will lessen and you’ll be able to reflect on the good times instead of the trauma you have now. Hard as it is, it just needs time. 💐
https://way-up.co.uk/