Could a yeast infection be a sign of conception?

Sorry if this is over share, but I have the start of a yeast infection; I'm in month 4 of being married and had one in month 1 but was told that could be my body adjusting to increased sexual activity. I have changed nothing with my diet or sex life, and am wondering "why this again?!" I have also been cramping the last 3 days and spotted a little today, and I'm still a good 2wks from my period and I'm never early.