so this is my first time ever posting and i need advice!?

so this is my time ever posting I need some advice I've been beating myself up for this which I'm obviously dumb for doing this and so I'm 16yrs old and in September I lost my virginty and me and my boyfriend did not use protection and ever since I have not started my period in 2months and he pulled out I mean way before he came and I'm on birth control and I know birth control doesn't always work for unprotected sex but before I met him my period was so irregular because of my birth control but never have been this late before and I'm needing some advice on what to do I'm scared and stressed out because of it....