So me and my boyfriend had sex on my last active pill day and before the sex I took my pill before the last active but I'm not sure if I swallowed that or not it probably fell in the water so the next day I took my last active pill and he came inside me.. Am I pregnant ? Today I'm on my placebo pills I have 4 left I took one today and got light spotting with brown residue on my panties what's this I've never had this before ..