Hi R.,
That could be a tough one... I understand how you feel, both of my kiddos never wanted to stop nursing.
I am guessing that you may already have heard advice like this or tried my recomendations, but just incase here it is:
I did not really understand why my kiddos had such a need to nurse so long, but might have just figured it out.
We as Mothers especially with more then one kiddo maybe multi tasking so much that the nursing becomes the main source for them to get all of the attention & for us to slow down..
We as Moms are so keyed into our babies eyes, needs, wants etc while we nurse.. That's not to say we arn't when we're not, but the child feels it the most at that time. If you could slowly cut out nursings to replace with another activity like reading a story on your lap to him, interacting while he eats smiling, singing,talking, dancing with him to music & giving lots of smiles & eye contact as much as you can throughout the day. Any kind of behavior good or bad such as biting is just a way for him to let you know he's uncomfortable or senses that something is happening.
Probably right now he's uncomfortable with teeth coming in & feels that he needs you more then ever, but yet he may sense your need to stop nursing so he's trying his best to let you know his frustration / his need. I know how hard it is to nurse for a long time, but I wish you the strength & ability to stop if you feel you must or continue on if you discover that is most beneficial for your little guy at this time.
As for the Mastitis I am so sorry to hear & hope that situtation clears up. I've had the mastitis and know how painful it is. When I tried to wean my first, it happend cause I'd only let him nurse for a short time on one side at a time. Maybe if you could let him nurse longer? If he's not interested in nursing longer then??
Have you talked to your pediatrician & regular family doctor? I am not sure how helpful that'll be advice is easy to give and take, but when it comes to weaning it's so tough on both Mom & baby.
I wish you the best and hope that things get better quickly for both of you! What ever you do make sure your at peace with it too cause once you stop nursing it is very final.. Enjoy this time as much as you can before you know it he'll have outgrown it anyway and may not be into the cuddling. The biting maybe something that you'll need to tap his lip w/your index finger, pull back & say no.
Sincerely,
K.