Don't know what to think

I'm 10 months pp and my periods have kinda been all over the place. Well we kinda had an accident and he finished inside me. I don't know exactly when I will get my period this month or when I'm supposed to. But I feel weird. Nonstop cramping the past couple days with no blood. And heartburn like crazy. I'm not like psyching myself out or anything, but I remember the cramping when I found out about my daughter. Took two test and both negative. Am I crazy right now? Really would rather not be preggers. Please don't judge this sucks enough as it is! Thanks y'all