Hi Belinda. Well congratulations!!! I'm so happy for you. I'm not sure but I don't think oral cancer is connected to hormonal changes like breast cancer and ovarian/uterian cancers are. I plan to start a family at the end of summer (hopefully i won't have trouble). This weighed heavily on my mind too.
I know that when pregnant you can't have the MRI's or Pet scans so just make sure you are going in for physical exams and scopes more often so that they can keep a close watch on you during your pregnancy. Then check with your Drs. on what they reccommend regarding MRI's after you deliver.
Take care of yourself and get lots of rest...You've been through a rough time and enjoy being pregnant too!
I'm sure everything will be fine.
K