Think I'm losing it! I had a miscarriage 4 weeks ago at 6 weeks. Then 2 weeks later I had 2 bfn tests. Randomly last Sunday I did a hpt as we had unprotected (we are ttc) and it was bfp 
but every test since is bfn.....has anyone had similar and gone on to be pregnant? This up and down is breaking my heart. I am 40 with 3 other kids but I want this....