Help me please

I took plan B on Monday (5 days ago) because the condom broke on Sunday and then had some spotting on Thursday (2 days ago), the medication said that some spotting may occur but I’ve still been spotting and it’s almost as if I’m back on my period which was only a week ago..

I took a pregnancy test on Wednesday and it said negative so I thought I was in the clear.

What do I do?