Pregnant after miscarriage?

Jazmin
So I had a miscarriage about 4 weeks ago on the dot. I was 8 weeks along with twins but they stopped growing at 5 weeks said the doc! She said I should get a period within 4 weeks. I've been tracking it on here and I haven't had ANY symptoms of a period yet which I normally ALWAYS get. I get crampy, sore boobs and bloated a couple days before I start. The reason I knew I was pregnant before was because I wasn't having any symptoms of a period! I'm just so worried because that seems too soon to conceive! I would want my next babe to stick! :/ anyone have any thoughts?? Or has any conceived right after a miscarriage?