Hi My Age Is 21 . I Am A Female.Actually

Hi my age is 21 . I am a female.Actually yesterday i has some kind of vaginal spotting .I thought that my periods have started because my date in the previous month was 14th but i am only having drop drop yesterday only three drops i dont know what has happnd .Do i need to visit a doctor?

plus i do some exercise daily

i do rope skipping upto 100 repititions yesterday i did 200 is that a reason or is there ny other reason .