With 13 years she won her first prize at the international competition »Young Musical Talents« in Sofia. She graduated at the National High School of Music in Sofia and continued her bachelor and master studies at the Vienna Conservatory Private University, at the Concervatoire a Rayonnement Deparemental in L’hay Les Roses, Paris, and  the Conservatory of Lausanne.

Petkova-Apostolova won several 1st prizes at international and national competitions. She was selected as principal cellist in orchestras like the Young Philharmonic Orchestra Sofia (Bulgaria), the Young Philharmonic Vienna, the Sinfonietta Orchestra Sofia and Sinfonietta dell'Arte (Austria). Since 2009 she is a member of the chamber music ensemble Trio Consenso Vienna. As a soloist she was performing on stages in Bulgaria, Austria, Germany and Switzerland.