Should I be passing tissue with such an early miscarriage

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​after having my daughter we've tried for over a year to conceive I got 3 positive tests in two days from different batches and the last two were lighter than the first and then on the third day I started to bleed and by the evening I had really bad cramps that pain killers didn't help took fourth pregnancy test it said not pregnant went to ER urine test was negative blood test was only 20 for hcg level and next day more unbearable cramps now today only slight cramping and I just passed this I was only 4 weeks (this is only day four passed when my period should have been I took a test the day AF was supposed to show) has any one passed tissue like this

NOTE: I told the doctor I had on a tampon and they said to wait until test came back and when it came back negative on urine and so low on blood they said they couldn't say whether I was pregnant previously or not (even with three positive test) and didn't say anything about the tampon but after passing this I've switched to a pad