Talk to Gynecologist on Periods While Breastfeeding

I gave birth to my baby in September. And I am exclusively breastfeeding mom. I haven't got periods after birth of my child. But on 23rd january i had light bleeding that too was not consistent and it happened just for a day. I tested myself for pregnancy as i thought it may be implantation bleedimg but it was negative. And now I am having nausea, acidity and certain food and smell aversions since two days. Were those periods or something else. Am I in early pregnancy? I can't test myself right now due to some family reasons. Please guide.