Should I separate from my husband now that we've learned from our past?

First of all, please excuse my English. It's not my native language. I used a translation program to help me. I hope that makes it easier to read. I'm too upset right now to find the right words on my own. But I'll understand your answers, and I want to thank you in advance for them.

There was a war in my home country. As is unfortunately common in war, many children were left orphaned. Both my husband and I are such orphans. We were both too young and too small to remember. Our ages have been estimated. According to those estimates, I am 32 years old. My husband is 33. We don’t know for sure. Our names were given to us by the respective aid organizations, since no one knew them.

I met my husband seven years ago through a kind of support group for war orphans. As you can imagine, our lives weren't exactly the best. But we found each other, supported one another, and healed our emotional scars. About four years ago, we both decided to set out to find our respective parents. We wanted to find out if they might still be alive, or at least what had happened to them. Maybe we also have grandparents, uncles, aunts, cousins, whatever.

Unfortunately, however, in the turmoil of the war and the postwar period, quite a few records from our respective children’s homes were lost or simply never existed in the first place. We were only able to find out when and where my husband was found. But that didn’t help much, since it didn’t allow us to identify any specific individuals. It was literally in a forest not far from a village.

A year ago, we learned that there’s a way to have your own DNA tested and compared against a database. That way, you can find relatives. We actually thought something like that would be prohibited under privacy laws, or that only the police could access such a database, but there’s actually a special regulation for cases like ours. A friend of ours with a similar story, whom we knew from our support group, told us that he found his aunt that way and, through her, the rest of his family who were still alive. He’s fully integrated into the family, and we were so happy to hear that story. We wanted that, too.

So we filed the applications, submitted all the paperwork, worked through all the red tape involved in the process, and a year ago my husband was able to submit his DNA sample. Four months ago, it was finally my turn. Two weeks ago, we received a letter. Both of us. On the same day. We thought the coincidence was pretty funny, but what followed was a nightmare: we’re brother and sister.

What should I do? What should we do? We actually wanted to have children. But now we don't even know if we should be together at all. It all feels so wrong. We can't even look at each other anymore. We both grew up in completely different places and didn't even know each other until seven years ago. It's a total nightmare.

My emotions are all over the place. His are, too. We're at our wits' end. We don't know what to do. But we can't tell anyone about this, for obvious reasons. We really need advice and help, though. Please, Reddit, help us.

P.S.: For obvious reasons, this is an account that was created solely for this post. I will read all the replies, really, every single one. But I don’t know if I’ll respond to questions or post an update. That really depends on whether I’ll have the emotional strength to do so. But I’ll try.