Very high AFP result?

My doctor called yesterday with the result of our AFP blood test and my result was high. I didn’t realize quite how high until I started researching but our result is 5.4 and anything over 2.5 can point to neural tube defects or placental problems. She tried to keep reassuring me it’s just a screening test and not diagnostic but I can’t help but freak out. I’m 17 weeks and they’re moving up our anatomy scan but we don’t know when the hospital will be able to get us in. Worse still, she called Friday afternoon so my husband and I are just sitting with this information not knowing anything all weekend (and likely into next week). I’ve been crying and really down and can’t help but worry something is wrong with a number so high. Anyone have a similar experience with a high result and baby was fine? Guess I’m looking for any hope right now.