Preg or jus body is weird ??? Plz help

Hayley

Ok so i didn't have a period this month I only spotted for three days when my period is supposed to be and it was very sporadic like a drop here or there and brown honestly it looked like implantation bleeding from the pics on the net well a day after spotting stopped I went to the doc the did a urine preg test and it came back negative but now I'm having good sensitivity and I've puked twice last night and feel very quesy this morning and jus sluggish and my hair is falling out a lil my question is should I test again and if so when or what do you think this could be or have u had a similar thing happen to u tia