Teenage pregnancy!! I'm not sure ?

I'm 15 years old I use pullout . I'm not a whore no rude comments please I've only done it with one guy been together for a year but for about 3 to 4 weeks I've had symtoms fatigue , cranky , emotional, nausea, dizziness, I had a very very light period only had to wear a panty liner. But idk if it was a period I dont count it as one so I'm 3 days late. Idc to have a baby it would be my pride and joy and my boyfriends also abortion would never be a option . So am I pregnant when shOuld I test