Hi and welcome to HCM!
Thanks for posting your query here.
The symptoms you are saying are correlating with early signs of pregnancy
which seems to be very weak. The faint line you are seeing is positive pregnancy. Please use folic acid
which will support the pregnancy. After using for one week if you test the urine you will get a strong positive line.
Now the alarming thing is your brown discharge which should be taken care of. Is it the first pregnancy or any miscarriages are there before? if it is you need to take care a lot. Avoid strenuous work and if possible take absolute bed rest
In cervical cancer
you wont get a positive pregnancy line. Ectopic pregnancy can be ruled out by taking a sonogram. Hence dont worry.
Its time to look your gynaec doc. They will examine and look for any bleeding causes.
Hope this is helpful to you