Hi A.,
There was a similar question here a few days back...I've modified my reply to that request, but check out the questions from a few days back to see what several other Mamas commented - there was some great stuff!
Ugh - I'm so sorry you are going through this! My daughter had a real rough time nursing from 10-18 weeks (and then occasionally after that), and I remember how difficult it was. Looking back, I think she was already having some teething pain, although she didn't break a tooth through until 5.5 months. The difference between my DD any your little guy is that she wouldn't take a bottle either...I was just beside myself, and was soooo frustrated.
Are you in a situation where you need him to take a bottle now? If not, keep encouraging him to nurse. In my opinion (and that's all it is!), this is not a weaning, but a strike.
To get my daughter to nurse, I would try to catch her before she woke up all the way and get her latched on before she even knew what was going on! ;) We were on a pretty good routine of nursing mostly after sleeping, so I could catch her a lot this way. I found if I swaddled her up or held her tight and swayed or walked around as I nursed that helped...just about killed my arms and back though! Whew! My SIL reminded me that in some places, bottles aren't an option...and they really will eat if they get desperate! A couple other ideas...maybe try a change of scenery?? Maybe outdoors if you have a private patio area? And...sometimes, I'd get her latched onto her paci and would try to make a quick switch...sometimes it did work! Also, try a dark place so that there are no distractions. My mom reminded me throughout my nursing "journey" that there are times throughout that first year that babies will try to wean...and if I didn't want her to wean, I was going to have to really work through those times. For me, it was totally worth it, but it was definitely hard work!
BUT - also remember you aren't a failure if he stops nursing. I really do think he'll come around though. My daughter did, and boy is she stubborn! ;) We were able to nurse till almost 17 months when she weaned completely, and it was a pleasant experience once we got through those couple of tough months....and she's 27 months now!
Message me if I can offer you any more words of encouragement...keep talking to the lactation consultant too.
Take care,
R.