Horny! Am i allowed to masturbate with a cerclage?

I had my cerclage at 15 weeks and had not had sex since December because my husband had travelled to a zika country from 23 Dec - 5 Jan and could not take the risk? I masturbated once once the cerclage snd my stomach always hoes hard then softens.... am i risking baby? The doctors dint give a-lot of information on what i can fo or not....

No judgement please