The OP has had some really sound advice on this thread, to discuss finances and a way forward with her DH, to monitor spending, to cut up cards, several people, including some who actually work in the industry or for debt charities have told the OP that it is pretty much unheard of for companies to add interest on a DMP, and that with careful managing, these debts are in no way insurmountable,
Posters have told her that she doesn't have to spend money on her little boy for him to have a fabulous and loving childhood.
But, she is putting all the blame on her DH, bemoaning that her son will not have a good childhood because of lack of money, and doesn't seem to be willing to take her head out of the sand. And complaining about not being able to afford IVF when they spent £10K on a wedding having already been through IVF to conceive their son. Surely if you know you will need IVF to conceive your second longed for child, you get married in a registry office and spend the £10K on the IVF.
Often, people who have conceived naturally, have to make the decision that they will only have one child due to financial constraints.
I know the OP came on to have a moan, but saying 'there, there, love, just have the IVF, don't worry about the debt, carry on with the takeaways etc', is not really helping - imagine the thread in a couple of years when she has 2 children and debt.
And saying she should have a 2nd so her son has a sibling to help with their parent's care in 20 years is just
.