pinkish or light brown discharge?

Hi mommies im on my 20th week and 4days of pregnancy,this morning may lumabas saking ganitong discharge i recently woke up,kumaen lang breakfast then nahiga na ulit,nafeel ko na basa undies ko so i check then pagka wipe ko may ganito na,ano kay ibig sabihin nito,before may lumabas sakin na ganito kanina medyo may slight sakit or pitik sa lower right side ng puson ko i dont know if sa ligaments yun,tapos nawawala naman din sakin,as of now nararamdaman ko si baby nagpipitik or gumagalaw naman siya..please enlighten me..thanks in advanced..