I'm On Loestrin 30 Have Been For 18 Years Took

I'm on loestrin 30 have been for 18 years took all pills correctly I have had sexual intercourse unprotected and started my period as normal 2 days after the course has finished and it lasted 2 days as normal just seemed a little lighter then normal so I took a pregnancy test on the 4th day of my break the day after my period finished this is negative do I need to be worried about the light period and pregnancy