to you MARIA ~ I had 4 miscarriages myself (3 of which were fairly early on too), so I truly understand the sadness and disappointment you are experiencing right now.
One of my cousins had what her doctors believed was a "false pregnancy". She tested positive and even had symptoms. She was very upset and confused by it, but we encouraged her to keep on trying and within a year, she got pregnant and went on to give birth to a healthy baby boy (plus she had 2 more after that).
Some of these may actually be chemical pregnancies, which are just very early miscarriages. Our testing today is so good that we catch them early. I read that most women have chemical pregnancies and don't even know it ...