Could I be Pregnant?

Help! I've taken 3 pregnancy tests today, all different brands and all came out very positive. But my last menstrual period was 10/24/18 and I'm not due again till 11/19/18 so I feel like it's too soon to celebrate. Last year I had a stillbirth baby boy and a year prior to that a miscarriage. I just started spotting very red blood right now, so I'm very anxious whether this is the rainbow baby we've been longing for. Has anyone else been positive that soon? Could I really be pregnant? 🤞