Pregnancy symptoms?

Can anybody tell me their experience or the first symptoms they felt when pregnant? Im a bit worried and i know i shouldn't be but i be feeling cramps under my belly , felt dizzy for a whole , my head hurted for a whole entired daaay ! I even be getting hungry everytime likei usually only eat in the morning and again in the afternoon when my bf comes from work and now i be getting hungry every 2 hours or less, no cravings tho and my period doesn't come till the 28th of this month , i had a my first baby but with him i didn't felt no symptoms so is hard for me to know, and will it he to early to take a pregancy test?