Maternity leave ending

I go back to work after TOMORROW, i literally have my last day today with my little boy and i am SO SO emotional about it. I've already extended it by using some annual leave but i can't use anymore as i need to save some for before my next mat leave as i am pregnant again (this is the only thing keeping me going atm knowing al be back with my little boy everyday again in a few months) How on earth do people get through the emotions of going back to work i never know it'd be this big of a thing i thought the day would just come and id go to work like normal and everything would be fine but wow it feels like im about to have a limb chopped off. Don't get me wrong maternity leave and post partum has been tough, i've suffered with PPD and being on my own all day everyday with a baby has really took a toll on that however it's been so worth it. I've also struggled to entertain my child constantly especially now he's a bit older and gets bored so easily and ends up fussy if he's not entertained constantly so at first i couldn't wait for it to be over so i could have some normality back but now it doesn't feel like normality it feels so strange and i just can't shake it. I can't even imagine going to work tomorrow and having to kiss my boy goodbye for the day 😔😔