Hi there. It depends how different you are. Just about everyone has different ways they behave in the different roles in their life. Maybe out spoken at home but quite at work, or anxious while driving but confident when cooking, that's normal range different.

But it sounds like your talking about two separate personality's that share the body and the relationships. Maybe one dose work and one dose home, which would feel like two different people, in one body, which is Disassociative Identity Disorder. Which is what Ive got. Maybe that's what your describing? If you think you can relate to this, then keep a diary and get both your parts to write in it. Figure out everything about them "like they were knew people that your meeting for the first time", Ask yourself lots of questions and write the answers down. If your D.I.D then this will really help. Its possible for two parts to exist but not be aware of each other, you might be one of those parts, Diary writing helps but if you think you might be D.I.D then you are going to need to find a good therapist so that your two parts can learn to work together and support each other. Hope this helps.