I can't get lubricated during sex fro the first time...what

My husband and I are going through IVF cycles and just finished our second one unseccsessfully, I got my period and 6 days after having the period we decided to have sex (we haven't for a month because of the ET we didn't want to bother the embrio inside afetr the implantation) the problem was that I couldn't get lubricated...and It happened again yesterday ; I am usually very very lubricated during sex, May be the use of crinone gel 8% (progesterone)?? Or just because the period was almost over?? Please tell me what to do ,because althoufgh i can get orgasmn my husband can't.