I'm 16 days late on my period , I had sex decemeber 7/8th on my period and I haven't got a period... I was suppose to have my period on the 1st of January but I started spotting on the 7th very pinkish blood it wasn't a steady blood flow it was very light and droplets and it lasted a few days I've had the tender and swollen boobs and my breast doesn't hurt anymore but they are still large... I took two pregnancy tests yhe first test came out as negative very clear the second one was sort of blurry like it didn't detect all the way they were cheap tests could I be pregnant ?

Pregnancy is possible. Try another test using first morning urine. If that test is negative, wait and see what happens with your next period. If you miss it, test again or get a blood test done.

If the test is positive, congrats.

Yes, pregnancy is possible, you have to be 14 days late just to start testing, and false negative is very possible even then.

Do another test, using urine first thing in the morning, as soon as you wake up.