DD is 33 months and nurses frequently, sometimes I have a bit of nausea when she nurses. I forget where I read that sometimes it can be helped with positioning--like not letting LO lay on your belly at all--try more of a sitting position where they are seated next to you or in front of you. I have noticed that it dos tend to be worse when DD is able to kick or touch my belly while nursing--I have already become very instinctively protective of my belly and have to watch my reactions with her and hubs--I do NOT want my belly touched!!!
Also, maybe try a handful of nuts right before or during your session?
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