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.
I've had all sorts of sounds in my ears. I've even had Morse Code clicking. I've been told that is has to do with some kind of spasm in a muscle by the ear. I even had the whooshing of sound in my ears in time with my heart (probably related to my blood pressure, though, not MS). I've also had phantom telephone ringing in the past. I rush to the telephone to pick it up, and discover that the phone never rang in the first place.