period delaying pills

Rebecca
Hi everyone, 
I'm 17 and my next period is due on the 13th of Jan (mine's almost always on time) and I'm going on vacation from the 10th to the 21st and I really really don't want to be on my period during my holiday. So that's when I thought of getting period delaying pills, I've never taken these before so I'm unaware of the side effects. It's taken me a while to convince my mum and I think she's kinda okay with the idea now. So far I know that these pills can be used to delay your period by up to 17 days but I only need to delay it by a week or so. I searched up the possible side effects and although some of them are kinda minor like itchiness and dizziness, some of the more severe side effects said depression, jaundice and migraines so now I'm kinda scared. Has anyone taken these before? Could you please help me out? I'm really lost.