Hello.
First of all, it's not your boyfriend's role to know what's in your vagina. It's YOURS. It's your body, and you should be familiar with it. You need to know what's going on, so put your finger inside and feel around. Does it feel different than before? If so, then you should see your gynecologist for a complete exam.Your uterus may be prolapsed (most likely scenario), causing the cervix to droop into the vaginal barrel. Dr. J
There is a variant of anatomy called a septate vagina, which basically can give you two chambers of your vagina. This implies that you would actually have a uterine variant as well.
Here are some terms to lookup on the internet.
Septate Vagina, Uterine didelphys
Good luck