Living life without my mum

Nealrly one year on from the death of my mum I feel I have put my grief aside to look after others mainly my dad.   I now find myself in a deep emotion of loss and miss my mum so much.

I put asude my emotions for my dad and daughter and now feel like a Waterfall of emotions is yet to engulf me.  Is this normal? Should I have grieved before why do we allow others to prioritise our own grief