Pregnant????

Oh my word!!! I took a pregnancy test yesterday and it was positive. I don't know if it could be a result of the hcg in my system or if I am really pregnant. So I have not taken a shot today, and will wait and test again on Tuesday when I know the hcg is out of my system.
Has anyone else out there ever taken a preg. test while on the shots?? I am very nervous right now.