What to do!!??! Help please!

So I had an mri scheduled for today 2/11/20 but I decided to take a test just in case and it came

Back positive. My period has been weird but i checked and I’m due around 10/23/20. If I have the mri it will terminate the pregnancy. But they had found a spot in my liver. They said it’s prob like a birthmark but they wanted to make sure. I’m so stuck. My husband and I have 4 kids so

This would be our 5th and this was a total

Accident. I was taking my pills not a single one missed. BUTTTTT I had the nexplanon on as we’ll that I did take out. I’m assuming something happened. Anyways what would you guys

Do?

Also my husband doesn’t want anymore kids and I wanted more just not right now. Our youngest is 10

Months almost. But I’m pro life. Ugh idk what to do.

That spot could actually be something much worse. So yeah