I need your ladies help

Last night was about 67° here in MO. I was out in the barn and I had the chills from hell. I had a huge coat on. Teeth were chattering. My back hurt so bad that I started crying. I cried all night and didn't get no sleep. Got up like 3 times to go pee. My head was about to bust. I'm about 4-5 DPO. Did any of you ladies have the same symptoms? I also had a 99.8 fever. I had chills and I got hot again and I just couldn't sleep. It's gone this morning, but the back pain is still here.