I had sex with a condom on the 23rd of April. I was worried that some precm got on the outside of condom while putting it on so took morning after pill 3 days later. Took a pregnancy test when period was 6 days late. Came out negative. Period eventually came. It seemed normal. Finished period but after wards carried on getting period pains and feeling emotional. It stopped and then started again today and I feel very hormonal. Is there still a chance of pregnancy? Should I take another test?