I'm really scared I'm pregnant

So I think I might be pregnant and I'm really scared if I am:'(
​I'm not in the time of my life that I want a baby yet, and I was on birth control which is very odd! Idk if it also that in march I had my period 2! In the beginning of the month and the end of the month going into the month of April and I still have not gotten my period:/ 
​I have been feeling very nausea and very moody but idk if it's cause I'm stressed at work as well and today I took a pregnancy test and it came out positive! Tomorrow in the morning I will take the second one as well but I'm really scared and idk how to tell my boyfriend  or explain it to him! Idk what to do...........????