Morning After Pill?! Help!!

So i took the morning after pill about 6 days ago (although I didn’t have Sex, my boyfriend came around the area, so we figured better safe than sorry) and i’ve been feeling sluggish! I even put on a little weight and i know this is normal. I was just wondering when will my body/hormones go back to normal?!? Once i get my period?! So confused!! Help :(

P.s it is also my first time taking it!