<s>[INST] i have had four positive pregnancy tests this past weekend. i have 34-36 day cycles and day 34 was friday. my period has still not begun ( day 37). the tests  show very pale test lines. with my previous two children, the test line was the same bright intensity as the control line when tested one day after missed period. can i be sure that i am pregnant and does the paleness of the line relate to this being an unhealthy pregnancy? [/INST] Hi I think you should do an early morning pregnancy test and if this is also faint then better go for an ultrasound as in some cases tubal pregnancy can happen. This also leads to delayed periods and a faintly positive pregnancy test. </s>