Had mastitis once with DS1 but that was over two years ago and can't really remember how I felt he was so little and I was so sleep deprived at the time! Never had any more problems with him.
DS2 is 14 weeks and I have had blocked ducts almost every week since he was born, and have always managed to clear them with a hot shower, lots of massaging and feeding lots from affected side. Not sure why I'm getting this so much, he feeds well and empties breast fully, I wear non wired feeding bras (it was wearing an underworked bra that gave me mastitis the one time with DS1). I wear him in a sling a lot as I did with DS1 and this seems to cause it sometimes but it's the only way to get him to sleep in the day! I try to avoid it until blocked duct has cleared though.
So I've had a banging throbbing headache for last two days, my eyes feel like they're going to bulge out of their sockets inwards if that makes sense 
this morning I woke up with an achy boob....AGAIN and all day I have been in agony aching all over, headache and feverish hot and cold. I tried massaging boob in shower and it helped a bit but still very slightly sore, not agony though and no red patches.
So is it likely to be mastitis or a blocked duct and unrelated Virus?Don't want to bother doctor if I don't have to as they're a forty minute drive away, and generally aren't that knowledgable about breast feeding issues, although I know some of you guys are. Currently huddled under duvet wearing a dressing gown and shivering