This is the first time I have posted anything so I hope I'm doing it right!

I am 22 and have been taking Ovcon 35 for almost 6 months and other forms of birth control for about four years (tricyclic pills, the ring, the patch, various low dose pills). I tried skipping my period last month for the first time ever because my boyfriend and I went on a trip. I had no break through bleeding or other problems skipping that period but the period that I was supposed to have last week started two days late and only lasted a few hours (basically just spotting). This worries me since I have been pretty regular for four years. I am a few days into a new pack but worry that if I am pregnant I should stop taking it. I saw several questions about too much bleeding from skipping periods but none on not enough. Is that normal just from the change in hormones or should I take a pregnancy test? Thanks for any advice!