Worried (first time mom)

4weeks4days na po akong preggy pero faint line pren ung sa PT ko. I tested 4 days ago po, day na dapat dumating period ko faint line po. the next day nag test po uli ako faint line pren. Today nagtest uli ako morning urine na pero faint line pren. should i be worried ? alam ko nag iincrease ung hcg every 24 to 48 hours so nag eexpect po ako ng solid line today. ntatakot po ako ma m/c