Plz do rply

Priya
Im ttc frm more thn one year.. usualy my periods length is 30 to 31 days.. bt ths mnth i hve three days past to my expctd periods..bt today in morning there are few drops of pinkish bleedng whn im psng my urine..bt aftr tht there ws nthng full day.. i ws only feelng cramps bt there is no bleedng aftr morning.. plz let me knw..wht ws that..??im pregnant or not