late with birth control?

So about a month ago I had a stomach virus and couldn't keep anything down so I quit taking my birth control for 2 days I started my period in those two days and then when I started back taking it I bled for like 2 weeks almost. Then I forgot to take it one day and now I'm late by 3 days, I took a pregnancy test yesterday and it said negative but i still haven't gotten my period could it be from this birth control?! I'm going crazy lol