Yes Before Yesterday (friday) I Had a Lot Of unconverted most of which came from a hidden coin bitmark i think? Now for some reason I have a lot less than I did on friday and I hane not had a now payment. So it look like I have lost the amount that I had unconverted on friday.
Can any one explain
?

The value of the unexchanged coin probably dropped before it could be exchanged. Or, blocks may have been orphaned and were removed from your unconfirmed balance before they could reach maturity and be exchanged.