LATE PERIOD

I’m on cycle day 49 (16days late) and I’ve had two other messed up periods this year. But this time round it’s so different. On the weekend I was really unwell sore boobs, bloating, pain in my right ovary, TIRED!!, and my back is killing me and still is. I come home and all I wanted to do is sleep. I’ve done pregnancy test and they come back negative. My boobs are so sore it hurts to wear a bra and sleep on my side and my back pain hasn’t stopped since Saturday. I’ve called the doctors and they told me to wait another week and do a test. if it’s still negative then they’ll book me in for a blood test. These symptoms I’ve not had before and want advise or if you e experienced this before what happened?