Why am i stressing over this so much?!

i missed my period and I haven't found out yet that im pregnant...i feel pregnant and know that i am because my actions and symptoms.... I been crying all day and feeling down.. like im just by myself... But im not , i have my boyfriend, my family around me... I told my friend that i missed my period but thats it, how can i relax and be calm about this??? How should i buy a prego test without anyone seeing??? I know a place where they sell prego tests but i dont have a car... Please help me.. my anxiety and anxiousness is killing me😞😞😞