I don't know what to feel right now

I got these 3 different positive tests different days. On 6/23/17 I started spotting... Monday 6/26/17 I went to the ER to see if everything was okay...they did a viginal ultrasound and blood test and urine test they all came back negative. I'm supposed to be 4 weeks today..The Doctor told me I might have just had a miscarriage.... I cried I don't know what to feel right now I'm sad .... Like I got 3 different test that said yes and right now they can't see anything?