I'm not sure what to tell my fwb cause I'm 14 days late

This may be long so I'm sorry..and please no negative comments because they are not needed..  I have a friends with benefits thing going on with this guy.. He's 27 a sweet caring person and he is absolutely amazing.. I've been single for awhile and have considered being with this guy but haven't made the steps to be his girlfriend because I'm scared to get in another relationship because of past ones.. we have sex a decent amount.. And I log onto my eve to see that I'm 14 days late.. Well first thought that comes to mind is shit I'm pregnant.. I'm 19 and I've miscarried once which I was 13 at the time.. I don't know if it's just anxiety at its best maybe I'll get my period.. I'm 19 I'm an adult and if I get pregnant that's ok I have a decent job.. The question here is what do I say to this guy? Should I test before I tell him? I just idk what to do cause my dad would probably flip shit cause he would tell me I need to use protection and not be stupid so I shouldn't tell him at all.. Just don't know what to do at this moment cause I don't have a car right now so not like I can go buy a test I have to tell someone so they can take me to get one..