Answer:
(Fatwa: 448/355/H=1431)
All the three talaqs took place and you became haram for your husband whether your husband was aware of the pregnancy or not, in both the situations the ruling is same. Talaq given by letter or email takes place as well.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
