please help

Ok well im very irregular on my period, but lately ive been getting it not to far apart.. me and my husband have been trying to conceive. This month i got what i think is my period but it was about 2-3 days long but it looked more like spotting. I usually get 4-6 days and kindq heavy normal cycles... so im not sure if im preagnant or not i tested but it looked negative to me...so not sure what to do. Please if anybody has some advice... also my body has been feeling strange lately...please help thanks in advance.