Sorry to hear
I think losing a parent is one of the hardest things we have to contend with in this life (definitely the hardest thing I've ever gone through), but all you can really do is be grateful for the time you have left and try to make the most of it, and make as many happy memories as you can with your Mom while she's still here with you, that's important I think as those memories will help carry you through life.
Again, very sorry to hear. Take care!
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"There are things known, and there are things unknown, and in between are the doors of perception."
--Aldous Huxley