Dreaming with sighs, either other people sighing or we doing it ourselves, means that something that weve been waiting for is going to take its time. Sighing usually means disappointment, discontent and great sufferings that approach or that are already being experienced.
Dream dictionary: weve dream meanings
Seeing weve lost weight in dream is a warning that we must take care of our health, as diseases are around us. If we dream we are very thin, it means that the risk of disease is very close, and the thinner we see us, the more important it will be.