Hi,
How exciting it to can be!
Well assuming if you are having a regular menstrual cycle of 28 days and normally on 14th day ovulation take place then conception likely took place on 17th august then You are 3weeks and 3 days
pregnant. (Fetal age: 1 week 3 days).You are in the first trimester of your pregnancy. This is just an example not the exact calculation as no one knows when conception took place.
Next Steps
You should visit to an Obstetrician and gynecologist for confirmation with ultrasound and that can give you the Fetal details.
Health Tips
Avoid lifting heavy weights and must have antenatal checkup and follow up with doctor.
Hope this might be helpful to you.