Someone give me some advice pls

Well, I want to start by saying that I’ve been TTC for 3 years, at first it was really hard for me to get pregnant, I told my doctor about it and he said I needed to weight at least 130 pounds(I was 111) so I started a healthy diet to get more weight and it worked I now weight 130, but well before I go to far, on August 31 2018 I found out I was pregnant (1st pregnancy)(I was 10 days late by then) I was really excited, but then on September 1 I started bleeding, more like spotting, and I just knew blood is not a good sign when you’re pregnant (If you know what I mean)

Well I miscarriage at 5 weeks exactly they told me so, so I ask why this happened, they said because I have (Rh negative) and I was carrying a Rh+ baby (didn’t understand as much) so I kept trying and on April 13 2019 I felt the need to test and I did it was positive, I went to the doctor, he confirmed that I was pregnant, but then April the 21st I started bleeding I just knew what was happening, I went to the ER and they confirmed that I miscarriage again at 5 weeks, was really sad and confused but kept trying, they did a ultrasound and all of that on me and told me that all in my belly was perfect (honestly I was hoping he told me you have this and this and we have a way to help but on what he told me I don’t know what to think, I don’t know what’s going on with me) and that he didn’t understand why I miscarriage but to keep on trying,

I then found out I was pregnant again on May 20 2019 and yes I miscarriage again, and the doctor only told me I need to take some prenatal and to not smoke or drink alcohol (I don’t do it anyways) so I started taking the prenatal, So on July 21st I found out I was pregnant and yes I’m now going through another miscarriage, and I don’t know what to do doctors don’t help at all they don’t ever have an answer to me, and I don’t see they do something to give me one, and this is so hard because we’re ready to have our family and I don’t see a future like this, I actually lost hope already, and I already feel myself going into a deep depression!, I just need to know what’s going on!

Please some help me recommending someone or what to do, where to go! PLEASE💔😔