I can't say for sure if the HCG shot can give you those specific symptoms but once its in your blood, it's not just 'there'... it's going to affect your body so, yes, I guess it can cause a metallic taste etc... I know the wait is horribly difficult and I know it's virtually impossible not to do this, but really, sadly, at this stage, analysing your symptoms is pointless. Just hang in there a bit longer.
oh yes i know it is way too early :) so that is why i wanted to know if the hcg could be making me so sick a week after i took it when i felt fine last week???