Egg bound African House snake

[lolaophidia]

A little history... Female laid 7 eggs on 5/22 (they all look infertile like her previous 2 clutches last year). I could tell she still had a few more left in her so I left the egg box in the cage. On 5/30 she laid 2 more eggs and was definitely still retaining at least 2 eggs- one was quite large from the external appearance. I figured I'd give her a little more time and see if she could pass them. On 6/6 I tried to gently manually apply pressure to the eggs to help her expell them with no luck. I was concerned that if I applied too much pressure I might injure her and the large egg right above the cloaca won't budge. Made an appt. with the vet for tonight (6:45pm) but I'm hoping for some suggestions to help the vet with his treatment. I don't know his experience level with aspiration and I'm concerned that he'll recommend surgery. If surgery is the appropriate treatment, I'll happily do that but I feel that other options may be less traumatic and costly. Any help would be appreciated!
Thanks,