Am i pregnant? weird symptoms. Help please.?

okay, im 18. I have been dizzy like motion sickness. feel like i have to throw up random times of the day and it lasts hours. my body get shaky.. i get headaches, ive been feeling puling and tugging either behind my belly button or pulling on my belly button.. i lose my train of thought, dreams have been very clear. i remember everything! been more tired than usual, i find myself yawning all day long. my back has been tired and i get sore muscles in random parts of my body. and i think that's all. If i was pregnant id be about two months. im more nervous and i get frustrated fast! please state your opinions, i want to know what you All think. ?