Help please

Seham
I was due on Friday 6th may I have. 24 day cycle always on time never late this month had no Af was late was happy etc on Monday the 9th was wiping watered down blood  thought nothing of it pain in back is killing me cervix is high cant feel it at all and bleeding starts and stops no clots just watered down blood I'm confuse been trying to get pregnant for a looooong time any ideas please