Mum guilt

For all the mums that have gone back to work after having their little ones how do you cope with the mum guilt?! I’m going back to work full time after Christmas and my daughter will only be just 4 months old. It breaks my heart it’s giving me anxiety and I’m crying most days. I’m lucky my mum will be looking after her but she will go from seeing me all day every day to only seeing me in evenings for bed time. I don’t want her thinking nanny is mummy I’m her mum but I have to work I can’t afford to live off the £1000 income drop 😭😭😭😭