Hello, I am using birth control pills, however, on the 5th of January, I have puked 2.5 hours after taking it. That night I had sex, so I was afraid that the pill might not have been absorbed fully and I could have got pregnant. Next day I took two pills at the same time. After 10 days I saw some brown discharge and since it has never happened to me, I thought about that night and thought it might have been a sign of implantation (However, I have to mention that this month has been extremely stressful for me and I have been going through some anxiety issues, so maybe that is a fault of stress). However, I did the HCG blood test on 22nd which came back negative. Can I be calm and trust it or it could have been too early to detect pregnancy? Thank you for your response.