Hi I'm 24 Yes Old .Last Month I Missed My

Hi I'm 24 yes old .Last month I missed my period ...I started to have lots of pregnancy symptoms I took 3 test all negative. 2 weeks after missed period I spotted for 2 weeks then third week had a light to medium period...im concerned this is not normal.I've only missed 1 period when I was 16 coming off b.c. patch...my periods normally last 4 to 6 days