Light period ?

Has anyone had a light period and found out they are pregnant? , I feel sick (but haven’t been sick) and breasts don’t hurt don’t have cramps , normally have to change my tampon every 2 hours but now there’s only a lil but if blood on the tampon (can’t go to doctors because of lock down ect) wasn’t meant to be on my period till 8th next month (it’s been 3 days now )