I am about 1 to 2 weeks late in my period. did 3 tests with very faint lines and another one which was digital but was negative. is there a chance i could be pregnant?

There's a chance: Faint lines you can barely see are usually considered negative. The lines should be getting more positive with each test - if that's not happening these are likely false positive. Suggest you get a quantitative blood HCG and know for sure one way or the other. Call your OB to get an order at the hospital lab to have this done.