ladies, need your opinion

starting from the beginning.. I started progesterone cream last month because I was having a very short cycle. (14 days) I had a full 28 day cycle last month (thanks to the progesterone cream) and started AF on the 29th of march. it was an odd period... I had 1 day of medium bleeding and the next 3 days light/spotting. I am currently on CD 15 and went from having brown spotting during ovulation to having red spotting. I'm not sure what is going on... is this my period? mid cycle spotting? ugh. I literally have been so tired lately ite ridiculous. I came home from work slept 4hrs woke up at 10am and still had no problem going back to bed at 11 and sleeping all night until 9. (very unlike me) ideas? comments? opinions? anything will help.