Partner of a transman--MY hormones

Hi all, 
New glower here. 
My partner started T 6 months ago, and three months ago moved in. Since he has lived here my hormones have been WAY off! I've had my period longer and longer, and it's been different than before. 
I'm seeing the OB/GYN in two days, so that's great, but has this ever happened?
I'm hoping birth control will do it, but good grief!!