My dog has been feeling off for the past week and a half, she was throwing up in the beginning, but it has happened before, mainly if she over eats, so we weren’t too concerned. But then the vomiting stopped and she seemed to get worse. she’s weak, she doesn’t eat or eats very little and immediately goes for the toilet and even then doesn’t do much, it’s small almost diarrhea like. And today we noticed that she started to limp a bit. I should mention that she’s very aggressive towards new people so that’s why we put off taking her to the vet for so long. She has had all of her shots done and as much as we tried to get her to take necessary pills, she would spit them right back out even though we tried disguising them, I don’t know what to do, what could it be and is it something serious as i think it is?