Take a deep breath:)
Time between period and ovulation can be days or months, depends on stress and outside/inside factors -- you might have a slow ovulation this cycle. If you've already ovulated, typically up to 15 days then period. After 2 or 3 weeks, test again, and if another week, then blood test? That would put you around 4-6 weeks if you were pregnant.
The BEST book in the world on conception (or not-conceiving) = Taking Charge Of Your Fertility. Get it. Read it. Lurv it. Live it:)
You learn how to take your morning temp in mouth (before leaving bed) to know when you ovulate; your egg only lives one day; you need 12 days from ovulation to period for a successful implantation; tracking your cycle versus daily events to see what effects or not; and many other tips. Less stess = more regular cycles:) After 6 months doing the tracking, you will have a basis for a meaningful conversation with your GYN should you need any intervention help.
Get the book -- library or friend or used... you will not regret it. Good luck!