It would be hard to tell if yu have irregular periods . I have irregular periods so I nvr knew when to take the test , until I got very I'll I found out I was already 9 weeks pregant. Yu should wait a week or two and then go see yur doctor for a blood test. But for now of yu don't want to get pregnant use protection, hope I helped (;
When's the earliest I could take a pregnancy test?
There is always a chance. Wait a few weeks and take a test and if you do not want to get pregnant you should probably start using some form of birth control
with my lil girl i got pregnant the day after i had the implant out and like you said there is sperm in pre*** so there is a small chance