Sorry ive confused some of you?

Okay so I have a bf we been together for a year and about 8 months hes been locked up for a while and he said I can do what ever I want while he locked up but once he gets out it must stop. So a while ago me and an ex boyfriend had sex unprotected we were talkinq as if we were getting back together thats wht I addressed him as my bf. But thats not gonna happen now me and my bf has talked about this and were both prayin im not he says he has no problem being there for me cause we dont plan to leave eachother any time soon so we been through this before when he got a female prenant and I was here for him. She lost the baby but its made me and him closer. Now I havent had my period since oct 11 that would make me 17 weeks tomorrow ive had all tje symptons ive takeing a pregnancy test a wjile agoin but it came back neg. I havent tesred since then but I have a dr appt on the 11th were going to do a pee test and blood test and ulyra sound ive gained weight the only thing I havent went through is throwing up but ive jad the urge to many times. Now my question to you is is there a high risk of pregnany I need personal comment and any thing else you willing to share. Yes im still in school im a jr in high school ill be 17 next month.