Thanks for your query.
Delayed periods and faint lines suggest that it is important to rule out pregnancy
Since you have started bleeding it could be your periods or even a abortion
To confirm whether you are pregnant or not it is important to get a Beta HCG
for pregnancy done).
If this is positive then you are pregnant and the bleeding will be of abortion.
If the Beta HCG test is negative then you can relax as then it will be bleeding of your period and the test with the strip was false.
Please get tested and if positive consult your Gynaecologist.