She's such a mush! Khloe Kardashian is having "anxiety" over her daughter True's first birthday tomorrow and there just might be reasons other than the first her daughter's turning one ...

Of course True's birthday is also the anniversary of baby daddy Tristan Thompson cheating on his pregnant wife just two days before True's birth ... I mean, seriously -- talk about the good and the bad all at once!

Khloe opened up on Twitter the other day, writing, "Is it weird that I think I’m having anxiety thinking True will be one on Friday?!?! 😩😩 I’m sad Time is flying as fast as it is. I’ll be happy, of course, I simply can’t understand where the time goes. Thank you Lord for every moment 🙏🏽💕 bring me the tissue 😢"

She also posted a pic of her and her daughter sitting in the yard playing together and an ADORABLE video of True talking to herself in the mirror :(below). Clearly it's an emotional time for any mom when their baby turns a year old, but for Khloe's it's particularly bittersweet since Tristan was caught cheating yet again, with Kylie Jenner's BFF Jordyn Woods just two months ago. That "broke up the family," as Khloe announced -- though let's be honest ... that relationship was doomed, literally, from the beginning. So Khloe celebrates her daughter's birthday now as a single mom, which is what she was destined to be since the day Tristan put a baby in her sonogram.

Still, Khloe's tough as nails, so she'll be just fine, particularly with this beauty by her side!

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