Is it possible to have a clogged duct for multiple weeks with little to no pain?

I found a lump in my left breast 3 weeks ago. I've had little to no pain associated with it and from what I can tell, the size has not changed. I'm breastfeeding my 8 month old so my initial thought was a clogged duct but never had pain. I called my ob today to see if they'd move my annual exam up to have it looked at. They suggested a warm compress and massage assuming it's a clogged duct. It doesn't seem like that is it to me but I have never experienced a clogged duct. Anyone else have a similar experience?