Delay in lodging FIR sec 498a

I live in Karnataka. I married my husband in May 2018, my husband is the only son to his parents. After marriage, I was living with my husband and his parents. After few days, my mother in law started torturing me, she never allowed me to spend private time with my husband. Then I got to know from my husband that his mother is a mental patient. For this reason, me and my husband started fighting as he cheated me & should have told me before marriage. I lived with them for only 2 months. Then I came back to my parents place, waited for 2 months for him, then we had conservation over phone also. When i realized that he is not changed, I gave complaint in Sahaya vani (women helpline centres) for counseling. To avoid attending counseling, he requested court for wife to come back and join him soon. He hurted me even in mediation centres. Then I waited for him for 1.5 years, just a week back he sent me divorce petition through court. Can I file dowry case against him and his parents now as it is a delay in lodging FIR section 498a. I'm helpless, please guide me