I Had Been On Nuva Ring For About 8 Months

I had been on nuva ring for about 8 months and recently stopped the use. I never put a new one in after my last period. I am now 15 days late. Ive taken a home test and it was negative for pregnancy. I am not experiencing sensitive nipples or cramping like I've read in other posts. I am peeing more frequently then ever before and I have increased appetite. Any ideas?