[2] Pastrana debuted professionally on 6 February 2016 defeating Bulgarian fighter Ivana Yaneva by technical knockout at the first round in a bout held at the Restaurante Escuela Taurina in Fuente el Saz de Jarama in the Community of Madrid.

[3] In October 2016, Pastrana competed for the vacant WBC silver female minimumweight title against Tina Rupprecht, but lost by unanimous decision after ten rounds.

[4] In May 2017, Pastrana won the EBU European female minimumweight title, after defeating French Sandy Coget by unanimous decision, in a bout held at the Palacio Vistalegre in Madrid.

[5] A few months later, in September, Pastrana made the first defense of her European title against Judit Hachbold, defeating the Hungarian fighter by knockout in the third round.

[8][9] On 4 August 2019, Pastrana fought Yokasta Valle from Costa Rica for the mini flyweight world title, in a bout held at Marbella.