Finally spotting after months

Saw a dark spot on my underwear this afternoon and wasn't sure what it was at first. I guess that is a sign of how long it's been since my last period. The spot was brown, which is typical of the beginning of my cycle. It will be interesting to see if this becomes a full cycle or just a light, brown dribble.
Note: I did have a headache a couple of days ago, which tends to be one of the pre-menstrual symptoms of my cycle.