Sayang, stomach cramps dan missed period boleh mean many things, bukan definitely pregnancy, bisa jadi hormonal atau apa-apa lain. Please do a proper test or go see your doctor/clinic, especially since this is your first baby and you want to know for sure! A blood test or ultrasound can confirm better than home kit. Once you get clarity, you'll feel so much better, okay? Sending you calm vibes, let me know what the doctor says!