@MamaMenna I'm sorry you're going through this, sounds very scary! Is the bleeding heavy or quite light? I've been through v similar....
Regarding breastfeeding, I know we have chatted before about this as I'm also still bf my DD. As you say, generally it's considered that BF in pregnancy is safe, however I do think for some people it can cause problems. This is due to the fact that breastfeeding increases the hormone prolactin, which in turn can decrease the production of the hormone progesterone. We need a high level of progesterone to maintain a pregnancy, so naturally, if it drops too low, it can cause miscarriage. Also, there has been research that shows a slightly elevated risk of mc if breastfeeding 'exclusively' - however I think this is hard to quantify, and if you're feeding through the night this could be similar to 'exclusively'. Every baby is different, I think basically if you are feeding a lot + through the night, this could elevate your risk slightly...
I had 3 miscarriages while BF my DD. The first two were v early on, around 5 weeks, so chemical pregnancies. At the time I was nursing through the night and on demand during the day. I then night weaned, and got pregnant again, and that pregnancy made it to 6+3. I started bleeding, we had a scan which showed the heartbeat, was given progesterone supplements then went home and told to bed rest, sadly the pregnancy passed the next day. At that time I was bf DD about 3-4 times a day. After that we dropped down to down to 2 feeds a day, and when I found out I was pregnant again, I dropped to just one which is where we are at now.
I know this is probably not want you want to hear, but just wanting to be honest about my experiences... everyone is different, I think everyone's ability to feed while pregnant is different too. Bleeding in early pregnancy can be a sign of low progesterone, so this could then be linked to BF as this can lower progesterone. Could you request progesterone suppositories? Have you had any previous losses? If you can I would night wean (I know it's hard 😥 ) and just drop down as much as you feel comfortable. No reason to say you can't keep bf, but it might give you some peace of mind + help to drop down. Happy to chat more if you want to DM me x