I am drowning

I have found out that my husband is in debt with credit cards. It was initially 10k this was when I was heavily pregnant. He then took out loans to keep up with the credit card payments and fell behind with those too. Now he's told me that he took out 2 phone contracts and flogged the phones for a quick buck. I share a mortgage with this man and I am so heartbroken with the lies and deceit especially whilst I've been pregnant. He's now asking me for help to pay it all off and my baby is only 3 months old. I've secured 2 jobs and I'll have to leave my child and work to help him pay it all off. I feel trapped be ause of the mortgage otherwise I would gave left. He's also got a mark on his credit file too and I'm worried it will affect our chances of remortgaging when it comes to it. Would if affect my credit rating too ad we share a mortgage. I am devastated as ive worked so so hard to get us where we are and now his lies and deceit has ruined it all.