Is It Advisable For Pregnancy When Scheduled For Spinal Fusion?

I am scheduled for a Sinal Fushion or at least working on scheduling a date. I had an Idea but this morning I found out that I am pregnant wich I was a afraid of. I did want another baby but scared of the timeing. I am in severe pain all day long. have not had a decent night sleep in a long time due to the pain. What the Heck can I do. Do not want to get rid of the baby. By the wat found out thru home Pregnancy test which lite up both pick line in 1 min. Can I still do the surgery?