I echo the 'Good luck tonight'. Hang in there, you'll do it.
I don't know if you ever get over losing your Mum. Ummm is right. The feeling of loss changes, the feeling of uncertainty changes. When Mum died I felt as if I was standing in space watching my world explode with bits of it hurtling past me as I ineffectually tried to catch them and rebuild something. Does that make sense?
The top layer, efficient me, coped well, did organising, legal bits etc. - and 9 months later had a weird breakdown. My doctor said that this was very common and was a sort of reverse pregnancy - so please give yourself time and space to mourn properly, please, please do.
'Does it get easier?' The answer is 'Yes', although right now I am hurting again because the feelings have come back. If you have children that helps because in some way I have powered my mum's love for me through to them (whether they know it or not).
'Do you ever get over it?' Not really, but all of us come to terms with our loss.
I do hope this helps; you will survive and somehow manage to put all the feelings into yourself as a different person. Your Mum never dies as long as she is remembered - someone said that to me.
What a long answer, sorry. My Mum did in 1992 by the way.