The 29-year-old, who is already mum to six-year-old son Blakely, spoke to This Morning presenters Phillip Schofield and Davina McCall about her desire to have another child, but said that the weight had affected her menstrual cycle.
'I want to have more children - not right now obviously because it's basically impossible - but it's something I want,' she explained.
'It's absolutely terrifying. I think because I've been so extreme with the way I've been doing things, when I do put weight on, it goes on a lot quicker.'
Chanelle, who is currently a size 18, added that she's suffering from a back injury, which has contributed to her weight gain, but doctors have said she needs to slim down before she can receive appropriate treatment.
'I'm too heavy. I'm on painkillers simply because I'm too heavy for my frame,' she continued.
'They did just say your back's never going to get better. I need an operation on it but they said, 'We're not going to do anything on it to your back until you've proved that you can lose weight.'
And back problems aren't the end of Chanelle's health concerns, as she confessed that she's also worried about the possibility of developing Type 2 diabetes: 'They've kind of said if you get any tingling in your limbs or lower limbs and stuff like that. They are keeping an eye on things. They want to do measurements.'
Chanelle has always professed to be happy and confident about her body, even appearing on Loose Women in 2016 wearing a bikini to show off her curves. At the time, she said that she weighed around 14 stone, and was a size 16.
'I still go to the gym and I can still get through a spin class,' she said to the panel. 'I work out a lot and I do a lot of healthy things. I do stuff, I don't just sit there and shove pizza in my face.'
However, she's now vowed to slim down in an effect to rid herself of the health problems the added pounds have caused.
'I'd like to be back to a size 12 or 14,' she told Phillip and Davina. 'I'm just going to have to make better choices - I've got to be more responsible.'