Our sweet yorkie girl is 10 yrs. old. She's always been a wonderful dog, and still is. But lately she has been acting strangely. In Feb. she had 2 seizures. She had not had any before. Has not had any since. She is acting very anxious at night time. She has always slept on my bed, every single night. For the past 3-4 weeks she will not even come in my room at night. If she does she will pant heavily, jump off bed and scratch door to get out. She then would go to my daughters room. I've given her melatonin. Still won't stay in my room. A few weeks back, right before this behavior began, she was on my bed and a very loud helicopter flew over and we could even see lights from our window from it. She sat up immediately and looked terrified, started shaking and hasn't been "normal" acting again since. This is new also, she'll wander in night and have diarrhea on floor . She had never used bathroom in house since she was a puppy. It's all very confusing. What could be wrong with our little girl?