Ttc #2

So last month before my period I was having hot flashes, and feeling nauseated but no puking, then two days later(11) I got my period. It lasted my normal 5 days, well in between that time my fiance and I had sex when it said I was ovulating, then on the 23 I had a little spotting for a day and a half, very light. Ever since then I had gained weight, eating more, feeling sick but nothing comes up. Um supposed to start my period tomorrow!! Help