Too scared to tell him

My husband and I talk about everything. Except my credit card. Last time he asked I owed like $4000 on it and I thought he was gonna lose his mind. I work a full time job + extras as an RN. I say I’m broke all the time and people just laugh it off thinking I’m being silly. But I’ve never been so financially stressed before in my life. I now owe $7000+ and I could never tell him that. But I literally have no choice but to use it when it come to having food for my kids. Most nights I skip supper so there’s enough for everyone else and leftovers so I can stretch a meal out longer. What do y’all do to make extra money? I’m really out of time as far as a second job 😓