Why does my uterus feel bloated?

[JustMe]

For the past 2-3 days my uterus has felt bloated, like it is full of air. Why could this be? I am on Nuvaring and also use condoms so I really don't think there's any chance of pregnancy. I took my ring out today so I should get my withdrawl period in about 2 days. I've been pooping regularly too. Any ideas?

 

[Jara]

Are you about to start your period? Having a uterus full of period junk could do that.. - ovarian cyst? If you're really concerned about it/experiencing any pain call your gyno for a check up!