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.
Phantom calls - phone rings, but no incoming call. I'm having a problem with my phone line, and wonder if anyone else has experienced the same thing? The phone rings randomly at all hours of the day and night, but when you pick it up there's nobody there. When you dial 1471 to find out the number, there's no number stored (only the last genuine call).