All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
The majority of the Muslim scholars are of the opinion that the time of throwing pebbles during the three days of Tashreeq (i.e. the 11th, 12th and 13th day of Thul-Hijjah) is from Midday until sunset. Jabir narrated that that “the Prophet threw pebbles on the Day of Nahr (10th of Thul-Hijjah) after the sunrise and he threw after post meridian.” [Muslim]
Imam Al-Bukhari reported from Ibn ‘Umar that he said: “We used to wait until the sun passed its meridian and then we threw the pebbles.”
Therefore, your Hajj is correct but you have to slaughter a sheep since you threw the pebbles before noon.
Allah knows best.