| | period help!
so I am going on vacation on June 23 and supposed to get my period on the 20th of that month. currently I am just about to end my cycle and start to go on birth control pills. when do I start talking the pill so I won't have it from June 23-30? I've heard that it is possible to but I do not understand how to do it. and what pills do I take first (there are 3 rows of white pills and one row of a brown color pills.)
I just want to change the cycle days so I won't have to ruin an exotic vacation! please help!