I'm worried about the SATS. Somebody please help me, I feel like my only option is to go into the NAVY.?

I'm REALLY worried about SATS. It seems like since I was in middle school that I've always had to worry about this test. SATS make me feel like if i do horrible, I will end up a failure. Recently I've gotten my PSAT score and it was around 1300-1360. All my peers seem to have gotten much higher scores than me. Also, I have to take morning cles for HSPA since I scored partially proficient in the Mach HSPA. Am I retarded? Am I screwed and destined to live a life picking up garbage or working at a gas station? =( Help me please.