Welcome to the forums, WYMead
Number of bubbles can be because of many things, measure the SG with yout hydrometer as accurately as posible and post it here. Take some mead into a tall glass or jar, or you can just carefully clean the hydrometer and put it inside the carboy (be sure you can retrieve it later, though!). After take it out and wash it carefully again. As long as it is clean, its ok to put in into the carboy. If you use a glass/ar clean it and the hydrometer, and after you measure the SG, return the must to the carboy (yes, it is okay as long as nothing dirty touches it. Like fingers. Mead and fingers dont do well).
Also read the newbee guide of this site, its really helpful, you did some things good, others not so good. Learn about rehidrating the yeast, nutrients, etc (most of it in the newbee guide). You can also use the search tool from this site to search for things you dont know. most are already explained. If you dont understand anything dont hesitate to ask. For the next time try to keep the SG at 1.12 max, you can add more honey later if you want (i say this because you wont find it in the newbee guide, not because its the most important thing)
Edit: caduseus beat me to it! Also yes, its benefitial to stir or shake the carboy to release extra CO2 once or twice a day until the ferment is over.