Hay, it's actually possible to get pregnant while breastfeeding kahit exclusive pa! Alam ko ng ilang moms na nangyari sa kanila, the signs are usually the same, like missed period, sore breasts, nausea, at parang gutom pa lagi, pero honestly mas mahirap ma-notice kasi similar din sa hormonal changes from breastfeeding itself. Best talaga is to do a pregnancy test or check with your OB kung nag-miss ka ng period or pakiramdam mo talaga may iba, kasi they can confirm for sure, don't rely lang sa symptoms kaya go na sa doctor para peace of mind mo.