My female dog is acting very weird near me, she's trying to hump me and she has never done that before. She's a three year old afghan hound. She starts crying when I get close to her and then moves as it she was trying to hump me. Nothing different, out of the ordinary has happened today and her she's not in heat yet. What could be wrong with her?

Please get her spayed. She will then behave more predictably without the humping and heat periods and will live a longer, healthier life.