Women, Kiddush and Bracha Acharonah

"I was told years ago that I should make kiddush before I eat Shabbos morning. Recently, someone told me that this was not necessary. What should I do?" "I recited the after bracha on the cake, but forgot to include al hagafen for the wine I drank. I didn’t know whether I was supposed to recite the bracha acharonah again, in order to say the al hagafen, or whether I should do nothing."