Hi mama! Based on your last period on February 16 or 17, you're likely around 4-5 months along na talaga, doctors count from the first day ng last menstruation kaya that's your starting point, then add the weeks or months from there. A few of us moms dito nag-panic din sa counting lol, pero once na may dating ultrasound mo from your OB, they'll confirm exactly how far along you really are kaya don't stress too much about being spot-on with the math. Congrats sa baby mo!