Anyone have to get a blood test done?

Hello ladies. My name is Shannon and I have been trying for years. At one time a doctor told me that if I ever did become pregnant it wouldn't show up on an at home pregnancy test and I would have to get my blood drawn. I was young at the time and didn't pay attention to this.

Fast forward to now. I have PCOS but my periods have been every 37 days until recently. I am currently on CD 68. I am experiencing sore boobs, backache, headaches, and nausea. I have had negative tests. The last test gave me an evap line. Anyone else ever have to get a blood test because of a similar situation?