Does 3 days of withdrawal bleeding/menstruation mean she's not pregnant?

Hi, Is the urine pregnancy test result is accurate in any day of my cycle? It's 28 days since the deed. And then is it okay to test the urine though it is not my first pee on the day that i'll test? Is it still be accurate? Is it true that if you're about to have your period, and you'll took urine pregnancy test, the test will turn positive? Thankyou in advance

What's the difference between the breast sore before period and breast sore in early pregnancy?

Is the cervix mucus always present if you're pregnant? Or it will stop too at any time?

Hi would like to ask question. They said using pregnancy test in not accurate sometime. I would like to ask if undergoing transvaginal ultrasound can detecg if im pregnant? Will it detect even on the first month after having unprotected sex?

Thank you,
Maria

I took ecp 26 hours after unprotected sex, withdrawal method but the pre-cum is surely in me. Then 6 days after taking the ECP, I had light brown stretchy mucus I guess. Then it lasted 1 day and a half. After that, the light brown started to turn into lgith brown with a very large amount of blood, which makes some part of the mucus very red. Then it turns to bleeding. Heavy bleeding like a period with clots like in the normal period. Then it lasted 6 days, in the last day, 6th day, it is not very heavy. Then in the 7th day after the bleeding started, I got again the light brown mucus with blood. Then turns into light brown. Then in the 8th day, my mucus is colorless mucus w/ brown tinge on it. In the next day my mucus, becomes like egg white then in the other, it turns to white. And in now and past 2 days, it changed to white and colorless and it is thick and sticky.
Questions:
Is it possible that the bleeding I got is my period?
Is it possible that the normal mucus will change color in just one day?
Do you think I’m pregnant?
I ovulated or ovulating in the time that we had unprotected sex. I need answers. Thankyou so much.

My expected period is on January 16, January 3 I had unprotected sex with my hubby. But instead of period, I got sticky brown with red idk what is that. Then it turns to sticky brown, then turn into color less, but on January 17-18-19, it is just only a very little colorless and little brown sticky again. Then on January 20, it is almost turning to pink and also have some sticky but not very sticky. Is that implantation?

After 7 days of bleeding, she had light brown sticky discharge turning to colorless. What can it be? Please reply. Thankyou so much.

CARDS

Hey mam. Please estimate her ovulation please if her period started on December 19 and has a 28 cycle. What is her exact ovulation day? Please reply. Thankyou so much.