I keep getting hardness and swelling in my lower abdomen, i'm not gassy or constipated, it often feels like i'm really full, any ideas?

Many possibilities: Possibilities are from nothing to things like a full bladder if you retain urine, large uterus, fluid in abdominal wall or inside. Bloating is nonspecific and makes me think of gastritis which could make your stomach feel full, make you burpy and have indigestion. Some problems in small intestine could also cause bloating. As you can see, you need a good consultation with a doctor.