i dont get it

hey different company started to make my birth control . me my boyfriend had unprotected sex but did not  in *** in me . then I had a really really light perid  I never have them So I took a test and it said I was not pregnant . can a different company make it change  my perid Now ?

[thatquietgirl]

I have had things like that happen from time to time.  Usually my periods are light to moderate and three days in length.  Once or twice I've had just spotting that lasted only two days.  Not pregnant.  It is a bit nerve wrecking when it's different from what has become normal while being on the pill, but I wouldn't worry too much.