Scared and having a hard time

We’re waiting for my husband’s Karyotype blood test results to come back, he has extremely low sperm count and we’re supposed to be starting IVF in January ( fingers crossed ) I’m worried that his test will come back with something and we won’t be able to continue with IVF. I’m terrified, the results should hopefully be back the 18th. I know it’s probably silly to cry everyday and be so worried, but it’s hard...and the hardest part is probably yet to come...