Since beginning raw, I've woken up almost every morning with a slightly runny nose- typically I blow my nose once and it's better. For the past 3-4 weeks I've been juicing a grapefruit and orange for breakfast, followed by a lot of water or herbal tea until early afternoon. I have noticed that my runny nose seemed to start up immediately after drinking the juice.

For the past 4 days, it's almost as if I have a cold- I have had a constant runny nose. It seems to run almost non-stop at certain points in the day (practically uncontrollably when drinking the grapefruit juice) and then will stop and clear up completely for a while, only to start up again a couple hours later. Other than a runny nose, I feel great. My eyes are clear, my skin is beginning to glow (I think), my throat and voice is clear, my energy is outstanding and overall I feel really good. I even woke up at 6am this morning with my energy buzzing.

Do you think this is a cold that I've caught that my body is doing a good job of fighting off, or do you think this is just a little bout of detox?

A cold is detox. The better question to ask is are you detoxing yesterday's meals, or old stuff from years ago. For most people who are detoxing continuously, they are detoxing yesterday's meals.

Hm, well I don't know why that would be. I eat high-raw, lots of fruit, and my only "cheats" are still vegan, cooked vegetables, edamame, a few spoonfuls of black beans or hummus, something of that sort- and not every day.

I think eating high raw is like taking two steps forward and one back.
High raw is good but just not as fast to get to the healing aspects of raw while expending more energy detoxing and that is why some raw peeps don't get to the healing part or take longer getting there IMO.