I think that after Angad has a hussle-tussle with Kripa's kidnapper, and after getting hit with the bullet, he will be rushed to the hospital and Josh or just any one of Angad's well-wishers will/try to contact Kripa, probably when both Kripa and Prithvi are about to start the pheras, Kripa's cell will start ringing, if she answers she will leave the mandap and rush to the hospital...(but I will not get is what she was doing with her cell-phone when she is getting married-well do we care?)
but if her over-worried mother-Gayatri Sharma doesn't let her--I mean she has been waiting for this marriage for a long time--she'll probably consider this as an interruption so she might not let the news reach Kripa and Kripa and Prithvi will get married, whilst Angad is in the hospital.