3 early mcs here, although the third was dealt with by the miscarriage clinic - booked ERPC so I didnt get to the bleeding stage, it was removed before then.
The first two started with light bleeding but the crucial thing that usually distinguishes a mc from harmless early bleeding is period- style cramps. If you have those, I think it’s pretty certain it’s a mc. If so, I’m very sorry. Mine were a much wanted second child as well, after years of infertility.
However, mcs are very common. I was able to more or less accept that fact, and keep trying. DS2 was my fifth pregnancy.
If you do a test it will almost certainly show a positive result. Tests done at the hospital certainly showed that each time. I think yoghurt still show a positive result for a while after the loss, until your hormones have gone back to normal.
In my cases, the first two anyway, I went straight to the emergency room at Liverpool Womens and did a pregnancy test there and they checked temperature etc. I was then scanned and told that they could see the sac but the dates and lack of heartbeat suggested a mc. I went home and passed the rest over the next few days. Both of mine were like heavy periods, unlike my DM who lost it in one go, bleeding heavily and being rushed to hospital.
Drs often prefer you to wait until after your first normal period after a mc, but as far as I’m aware this is just for ease of dating conception. There is no medical reason why you need to wait after a normal mc.