Extremely tired

For the past week I have been extremely exhausted. So much so I'll wake up from a full 8-10 hours of sleep and feel like I should just go back to sleep. I didn't even have the energy to clean yesterday and that's crazy for me. I also have had really sore breasts and my nipples were insanely sensitive one day then itchy the next. I had the IUD taken out in October and have been using condoms ever since so my period is still getting back to normal but it should come within the best few days.  Is this just normal PMS? My cervix is also low and extremely soft and open I believe.