i need answers!! 😩😩😩

Sooo i had sex 2 months ago ... got my period regularly last month but im feeling signs of pregnancy kind of . My hair is falling out alot, i have these flutters in my belly , i get mini cramps here and there, a little nauseous, and my daughter is so fussy now . They say when your kids act up for no reason u can be pregnant again, but im losing weight too ! Idk what to think!!!  HELP !!