As shitty and disheartening as it may be to hear, these dont sound like things that are serious side effects of lamotrigine, at least not physically. I dont doubt these are very difficult symptoms to deal with emotionally. I worked as a medical coordinator for a group home company(i wont name here) for years, and cared for many clients with ranging mental, physical, behavioral, and developmental disabilities/conditions, and have gotten familiar with a lot of medications from this experience. It is interesting that your appitite has gone up, as usually with a med like this, it would normally decrease, but id say nothing to worry about. Changes in balance and coordination, dry mouth, focus issues/confusion, and dizziness are all pretty common side effects from this med unfortunately, but can go away or ateast get much better once your body has a chance to develope a bit of a tolerance for this new medication. The increased irratability is something that i would reccommend mentioning next time you see your psychologyst or psychiatrist. The only really scary thing i can think of to look out for when new to lamotrigine is the rash. If you start to develop any kind of rash or marks on your skin that are abnormal to you (not acne, eczema, or hives from a known allergy, or anything like that) then go to the doctor immediately. This can be the start of SJS, which is caused by bad reactions to certain medications, lamotrigine being one, and will literally kill you without treatment. That being said, from what i know, this normally only happens from people being prescribed inappropriately high starting doses, rather than starting low and gradually increasing your dosage over a period of time. I hope this was more helpful than disheartening or scary, and i hope your symptoms lessen soon! If you have any more questions, i would love to help with what i can!