CRISIS!

I am 2 days shy of 38 weeks. Let me give some back story. My husband was diagnosed with Hodgkins Lymphoma at the age of 12. Underwent extensive chemo and was told he had a 10% chance of having kids. We tried for 3 years, with multiple miscarriages. We finally have been able to carry one full term ❤️ I have been depressed for the last few weeks (every day life, bills, no job.) My husband has been amazing. I know it's just hormones. But...a few days ago we received a letter in the mail asking about earnings from my husband for another child. We had no idea about this child for almost 3 years of marriage now. We don't know 100% that's its his child, but the dates are adding up. I'm in a full blown panic. I dont know how to feel. After trying for so long to have a baby and finally being able to carry, now this. I don't know what to do. Or really what I'm looking for here. Just need some input.