6 days before my scheduled period took Preg. Test

I took a pregnancy test 6 days before and it showed neg. right away but next morning showed positive.... then yesterday 2 days before schedule period took test and results said neg about 5-10 min later went to do a few things maybe 2 hours at most being gone fiance looks at test and there's a a faint line again and darker then the first test taken... have symptoms nausea, puking, cramps in abdominal area.... anyone else experience this and if so any ideas or suggestions, thanks!!