That’s the thing....she lays a soft shelled egg daily and lays a hard shell once a week. I know she is new to laying so I have been letting her system get the kinks out, but after what she just laid, I’m thinking there maybe a problem.It would be helpful to see it thawed out. Even if it isn't a "lash" egg, it's not normal and it's something to keep an eye on. It might just be yolk, egg white, and membranes without infection, but it could mean something is brewing. If the duck that laid that lays a normal one in the next few days then I doubt you need to worry.
If they don't suggest Baytril (enrofloxacin), ask them why they are prescribing wherever drug it is. Some vets won't prescribe Baytril because it's banned for use in poultry, but from what I know about treating this, it is the best drug to use.