I started laying the first couple of rows of blocks yesterday up to DPC. Overnight, the trench flooded meaning that the first row of blocks and the mortar was underwater. I have pumped it out this morning to carry on but the mortar is very soft, will this be ok? Even the next row of blocks that have soaked up the water is soft. I am carrying on today but water is still draining into the trench so i am regularly pumping it out to allow me to work but is this all a waste of time? I have used 5 snd to 1 mastercrete with plasticiser. Any urgent advice is appreciated.