almost 2 months late

Mary

so the last day period i got was dec 8th 2017 i never got my period for January. ive already been to the hospital (for strep) but when the dr asked about my period she looked at me weird and asked if we were trying i said yes. so she did a urine test on me but came back negative. i dont wanna stress myself out or get to excited because im so tired of negative results. i dont know what to do. help?