How To Cure Loose Vagina?

Dear Doctor.... I m 50yrs old at 5ft 5ins has a weight of 197lbs but working on my weight currently. I m starting to see changes in my body,Its loose and my vagina,the vulva is very thin. I want to know if I can correct it. Please help me & thanks for your advice in advance. Just to let you know that I ve been single for 9years,lol though I materbate because as I get older, my sexual urge tends to get stronger. Please advice me!! Annie