Is it normal to get your period for only 2 days after plan b?

So I took a plan b pill earlier this month , I didn’t get my period the day I was suppose too so I was freaking out especially cuz I was having horrible symptoms a few days before like nausea, anyways I took I pregnancy test that day and it was negative and the day after (Sunday) I got my period so I had my period Sunday and Monday and it was kinda heavy like when I usually get it . and today I’m not bleeding at all , my period usually last 4 days ...is this normal ?