2ND PREGNANCY EARLY SIGNS?

hi. I had my first baby last April... She is almost 10 months old now. the past couple days my lower stomach has hurt. not really crampy but hurting. every now and then it'll cramp more extreme, but generally just pain. I'm still breastfeeding and haven't gotten a period yet. no other symptoms (that I know of..I also have a cold so I feel crappy anyways). no weird smells. no weird discharge.