Melissa said her first coffee in the morning after a sleepless night "feels like the only friend that can help get you through the day."
"Home cooked meals are minimal or non existent. Takeaway becomes the only option as you stare down the barrel of another sleepless night ahead," she continued.
"As the sun begins to set, you realise that you haven't stepped outside your house in days. But you don't feel bad, you feel safe hiding behind those four walls. The dirty clothes basket is overflowing and those that are clean become obstacles around the house."
The former reality star admitted that what was once her tidy Melbourne home is now "littered with bottles, bibs and nappies," saying she avoids inviting friends over.
"When colic sets in, you're matching tears of pain with your baby, wishing you could do anything to relieve theirs. And feeling so unbelievably guilty as you begin to unintentionally pay less attention to their sibling or your partner," she said.
"But even through all of this - you manage to find something within yourself to power through each day.
"You find the strength when you look into your baby's eyes. That beautiful little smile (even if it is wind). Those fleeting moments of koala cuddles. You remember that you have never loved anything quite like your baby."
Melissa said her raw post was dedicated to "every Mummy/Daddy/parent out there struggling".
The mother-of-two received an outpouring of support, with her MAFS co-star and the twins' godfather Jason Engler commenting: "You're doing amazing Liss."
Australian Survivor star Felicity Egginton also wrote words of encouragement: "You guys are doing amazing. So proud of you."
Earlier this month, Melissa updated fans about the reality of caring for newborns after suffering through "catastrophic" nights of interrupted sleep.
"The sleep deprivation is just next level," she said in a video, visibly emotional.
"You are told by everyone that, 'enjoy your sleep now, you're not going to get any sleep when the baby arrives '... and yes, that's very true, and I'm aware of that."
This article previously appeared on Now To Love.