A bed full of ants indicate dissatisfaction in your life, stands for some force. There things that bother you or make you uncomfortable, but you have no way of changing or getting rid of them, signals of your new self. The ants also be seen as symbols of minor problems and annoyances that have accumulated and have now turned into a bigger problem, a hint for repressed emotional thoughts or ideas that you are yearning to let out.
Another possibility is that the dream indicates a lack of hygiene in your life, symbolises carefree nature. Ants indicate dirt and chaos, and the presence of ants in your bed mean that you are neglecting your surroundings or not taking sufficient care of your health and physical well-being, an evidence for the calm before the storm.