That could be a number of things. Have you changed anything like your diet? Are you constipated? Could explain cramping & swelling, (less intake of salt). The question everyone will ask: are u pregant? Have you experienced any weight gain as well? If these symptoms persist & become bothersome. See your Dr. & maybe bloodwork will be ordered. If your feeling fatigue
it could also be your thyroid
. However, it's always best to report this to your Dr. so u can get control of it.