yes I think it is a good thing.
By extra stressor I mean that because Iām on trial each training session with the team is very high intensity with the same kind of emotional/mental/physical drain of an actual match.
now I have a month extra to prepare.
Yes I was doing the sets of ten because that is what it recommended in the GPP dvd I have. It was a mistake to start out like that 
Thanks for the suggestion; I will do that next time I do med ball throws.
The weight I used was 6 kilos. I also have an 8 kilo medicine ball but I thought I would work up to that.