Khloe Kardashian. Picture: Instagram

Khloe Kardashian has a "ton of anxiety" about returning to work on Friday and leaving her newborn baby True for a lengthy period of time.

The 'Keeping Up With the Kardashians' star gave birth to her daughter, True - whose father is pro basketball player Tristan Thompson - nearly 12 weeks ago, but her maternity leave comes to an end on Friday, and she is "freaking out" about being away from her little one. 

In a series of videos uploaded on her Snapchat account on Thursday (05.07.18), she said: "Tomorrow is my first day back to work. 

"I have missed a feeding here or there with True, but I've never missed multiple feedings in a day. So I have a ton of anxiety.

"I've been thinking about the 6th, the 6th, the 6th, oh my God, I have to start work on the 6th and I've been getting just anxious about it. And today I'm very anxious.

"I don't know how I'm going to leave her all day tomorrow. That's freaking me out. But I got to go back to work at some point. So I'll be okay, right mama?

"I don't know what to do because I love our routine together."

Khloe even issued an apology to her sister Kourtney Kardashian - who has kids Mason, eight, Penelope, five, and Reign, three, with her ex Scott Disick - for all the times she has poked fun at her about being a working mother. 

She added: "Kourtney, I take back all the times I've made fun of you."

In the clips, Khloe could be seen cradling True and giving her kisses on the cheek in between sentences. 

The mother-of-one has a number of business ventures, including her own fashion label, Good American.