White calla lily looks sad, what do I do?

Hello! I got this white calla about 3 weeks ago, since it’s been in my apartment it has been slowly drooping and looking more and more “sad”. I thought maybe i’m underwatering it and tried to water more often lately, but no luck in getting it to pep up. I water approximately once every 5-6 days, once the soil starts feeling dry to the touch. It looked like it had some new leaves sprouting when I bought it but now they look brown and dry, the flowers are turning green and there are no new blooms 🙁

Any insight? My friend said it might be “dormant” but is that supposed to happen in summer?

Thank you very much!