could I be pregnant. please help!

Chaya
 Could I be pregnant? This is me and my boyfriend and we met about 3 weeks ago. The day after we met was the first time we had sex. After that it was like everyday for the next three weeks. We never used condoms because we both hated the feeling. He seemed pretty good with the pull out method and he always peed if he would cum and we wanted another round. So we continued with what we were doing. There was this one time where we had sex for 2 1/2 hours straight and when he did cum he pulled out. It wasn't until last week that I started to get sick and missed my period which is sort of rare. I'm a 17 year old college student with a gallbladder disorder that causes me to go to the hospital a lot. Sometimes I'll have a gallbladder attack and be ok but Saturday morning I woke up at 5 and was having an attack. I was also nauseous. After my attack I threw up and felt like shit the whole day. I never throw up from an attack but one time months ago. I am now 5 days late on my period and last night I had the worst migraine I wanted to cry but couldn't. I kept feeling like I was going to throw up but didn't. Finally my boyfriends neighbor gave me 800mg ibuprofen and I knocked out. I woke up this morning with a queasy stomach and my head still hurting. Please help me out. I'm taking the test at 11 but want to prepare myself and find a way to tell my mom. I have surgery a week from today to have my gallbladder removed. I read the surgery can still be done if I'm pregnant but I don't want to be home for a week with my mother plotting to kill me. I'm 22000 in debt for school and need to plan this out 😞