Hello I Am Dee. I Am 33 And Have Had

hello i am Dee. I am 33 and have had pcos for years. I have 10yr old twins so i know i can conceive. I regularly check my cervical position as i am ttc. I have had minor cramps every day for about 5 days and headaches which i nevet get. I also have vomited a few days as well. Today is cd 28 and all cramps have stopped. On my period day. Well i checked my cp this morning to chart. It was med to high and soft and closed. I checked an hour ago and i can barely reach it. I took a test and it was negative. Is this normal for menstruation.