The color of the line is insignificant. Pregnancy tests can only tell you if you are pregnant. The darkness of the line is no indication of how pregnant you are or how far along you are. You can use the brand tests, even from the same box and get a lighter or darker line any time.
The phantom calls that you have recieved, also known as ghost calls is usually caused by either a poor quality phone line, aka has a high amount of noise or foreign battery due to the line or your on an older copper line.
If you suspect that there might be a tap on your phone, walk over to a radio or television during your next phone call. Even if there is no audible interference on your phone itself, there is some chance that interference could occur when you stand next to another electronic device, causing static with that device. Any conversation you have within 20 feet (6 m) of the phone might be heard. 2  In the case of a landline, if you can hear a dial tone when your phone is on the hook, this is another sign of a tap. 3  Verify the presence of this noise with an external amplifier.