And?-nothing has appeared
Depends what they are, fritillaries will be ok, they'll think it's a watermeadow.
Solid clay -with a few inches of top soil-does not sound anything like ideal-not much you can do other than wait and see?
Bulbs are surprisingly resilient. My front lawn floods regularly as there is something of a hard pan below the topsoil, and I live in a marshy area. Although I lose a few bulbs, the majority keep coming back, so I wouldn't despair.