I'm a couple weeks into taking this Loestrin pill, after being on...

I'm a couple weeks into taking this Loestrin pill, after being on Seasonique for about 3 months, and I'm nervous about it. I'm in a monogamous relationship with my boyfriend, he uses condoms [none of them broke or slipped off], and I'm on birth control [haven't missed a pill and I'm no where near the time to have my period], but I'm experiencing nausea in the morning, weird food cravings, unpleasant cramps, headaches, but still light blood spotting. I was absolutely terrified that I was pregnant, but after reading these other entries, it seems mildly common to 'be pregnant' for a month. To be safe I'm getting a pregnancy test, but I'm hoping that the chemicals in the Loestrin doesn't mess with the test. I don't think I dig these pills very much if this is going to happen every month.