Wife threatens to commit suicide frequently on pity things

I got married on 26 May 2019. My wife is 43 years old and has infertility issues, she is unable to conceive. many doctors confirmed this. The only option left is IVF with donor eggs which is a costly deal. Can this marriage be annulled on the ground of her infertility?. Secondly, she is a very unstable person mentally. We have one counseling session about this in one of the psychiatrists in Sangli but later on, due to some circumstances, we were unable to pursue the said counseling. My wife had made one suicide attempt 3 years before the marriage which she herself told me about. After our marriage, she threatens me to commit suicide in case if do or don't do certain things that she wishes for. things are always so pity, like if I don't eat the food she goes wild, etc. I am living under tremendous pressure which is affecting my health. My parents are above 75 and are on medication. What is a legal remedy for me? Plz help