i used 600 mg ew of test cyp for 8 weeks , planned for 12 but some how ran short , so i thought about filling it in with some prop @ 100 mg ed . now the question is , how long do i have to wait untill i take my first shot of prop after my last shot of cyp , and would it matter if the last shot was 10 days ago , also i think my cyp coulda been fake or underdosed. some advice would be appreciated.