Did I ovulate?

Megan
New to charting and off the pill since mid-November. FF says I ovulated at say 20 (I think the temps on day 18 and 19 were a bit high b/c New Years time drinks) but now the temps are going down again and if I get AF tomorrow does that mean a 6-day luteal phase? Anyone agree with FF's crosshairs?  Any way this is an implantation dip or am I being delusional? Thanks in advance!