Hi dear, many a times we go through different stages with happenings around usm bring pregnant is not easy. Moreover bwing in the third trimester. D9 not be so hard on yourself. Emotionally you are changing due to hormones. There could be many factors which is causing you such emotions. Did anything happen recently? Usually when such things happens, it could be due to many reasons. Has rship with hub been good? It is hard to gauge from here or to advise. However, it is best to relax and pamper yourself as the D day gets nearer.