Hello
Thank you for your query.
It seems as if you have again suffered an early pregnancy
miscarriage.
That could explain the very weakly positive urine test, but a negative
blood test.
Just to be on the safer side, a repeat B HCG blood test after a week would confirm if there IS a pregnancy.
I need to have more details regarding your miscarriages to comment.
There could be genetic causes,
autoimmune disorders, uterine abnormalities in size and shape , intra uterine infections, hormonal imbalances etc.
Also, the details of the time of previous abortions, to know exactly if you have a problem in conceiving as well.
If you do have issues regarding
fertility, ovamit or
clomiphene is often given to help ovulation and conception.
However there are various aspects to fertility like semen count, tubal patency, hormonal status etc.
Based on what you have provided, it is difficult to opine.
Take care