Wah, congratulations dulu kak! Tapi memang boleh pregnant cepat lepas gugur, ada few of my mum friends yang sama situation, some within weeks, some dalam sebulan je, so it's not unusual at all. The thing is, lepas miscarriage hormon memang boleh ambil masa nak settle balik, so the dizziness + positive test together tu likely genuine pregnancy, tapi sebab the timing close sangat, better check with your doctor or gynae to make sure everything's okay and dating the pregnancy properly. Semoga kali ni smooth sailing for you, stay strong!