Lots of things can happen when you change pills. Different pills work in different ways and can cause you to have lighter periods, so that's nothing to worry about. If you had a negative HPT and you still have continued to have periods, you're probably not pregnant....but you can test again in another couple weeks for peace of mind

i was in the hospital and wasnt allowed to take my pills. when i was able to i kept forgetting and when i finally did remember i took them all. stupidly. Can those hormones mess with a pregnancy test? and i spotted but then stopped that doesnt mean im pregnant right?