Hello! I'm 16 years old. I'm currently taking Gildess FE 1/20 as my birth control and recently started my 3rd pill pack. I had sex with my boyfriend, and he did use a condom. A couple days later I started my sugar pills and I never got my period, which until that point was occurring every other week. Then I started a new pack, and had sex with him again with a condom. It's been 4 days since then and I noticed some dark brown discharge. I was wondering if that's implantation bleeding or not. I was under the impression that only happens as early as 6-10 days after intercourse. I haven't been nauseous, but I did have some breat soreness, however that only lasted a day. Thanks in advance!