2 weeks delayed, three tests are negative

Please repeat the question in English. Also state:

1. What date did your previous period start (the period that was prior to the one that started 9 March)?
2. How long is your cycle (typically 28 days)?
3. What dates have you had sex since 9 March?

Hi, im chi and my first day of the last period is August 2 which i mark on my phone calendar. Unprotected sex, and also had stress once lately since i started working augudt 24.
So my last period day is August 2. Until noe sept16 no sign of period plus. I took pt last 4-5days ago and tge first one is invalid and the second one comes negative immediately. I was wondering when i do get preggy if iam right now and could i be preggy? It is too early to take prggy test. I have exp nausea, sometimes my boob sore but not frequently i pee a lot likr unssual i can't control it like hold it for like a minute rather thab the ussual.and sometimes i hve a light milky discharge that i thought i am preggy. And i think iam always hungry that usual. Please help me i need immediate reponse thnk you im a filipina and i want to have a kid as soon as possible. Thnk you please enlighten me