Absolutely furious...false hope.

I got my BFP on Monday with two separate branded tests (cb and fr) and then tested the following morning and got two more BFP. 
​I started spotting more heavily then full on Friday which then got progressively more painful and heavy. I was so worried as my doctor said I was 7 weeks gone so we went to a and e. Had all tests done and blood test said i had never conceived. 
​I am heart broken and feel completely deceived from these tests. I've had false positive opk previously. For someone who is struggling to ovulate and has been told it's going to be very hard for me to concieve, I feel really angry for that false hope.  So sorry to rant but grrrrr!