I recently had sex on July 30th (yes he cummed inside me). I have the Mirena IUD but two days after my partner and I had sex I stopped my regular spotting. I've had the IUD since the beginnnng of June. I took a test about 8 days after we had sex but it came up negative. Even though there is only a 1% chance of pregnancy with the Mirena. Could I be pregnant? Did I take the test too early?