Why would i have night sweats and hot flashes since i had a partial hyster 13 yrs ago? they are getting worse now for sure and i'm feeling mohormonal

Probably menopause: It is important that you understand that the type of hysterectomy that you had usually means that only the uterus is taken out and the ovaries are left in. If that is the case, then you will go through a natural menopause when your ovaries stop producing adequate hormones. It is not surprising at your age for these symptoms to be starting. You might consider getting your hormones tested.