Pregnant or not ??!

I haven’t got my period at all this year! I got it October 14-18 in November 8 I had unprotected sex and didn’t get my period but then December came and I got my period 5-8 and December 28 I had unprotected sex again but my bf doesn’t really know if he pulled out or not and I didn’t get my period in January of 2018 and it’s February 14,2018 and I still haven’t got it. I’m honestly scared because what if I am pregnant and my parents would be disappointed in me I wanna get a test but i don’t know how to get if there my only ride and they’ll be with me at the store seeing what i get. What should I do !? I’m really scared I don’t wanna believe that i am pregnant but it’s just a thought now thinking that i am...