miscarriage

so excited finding out we were pregnant to have it all come to an end today. I woke up this morning went to go to the bathroom and blood. I though ok well this is normal dont freak out but then again bathroom 10min later more blood. I went in for an ultra sound and nothing was seen on ultrasound. I have been balling my eyes out all day. I just started a new job 2 weeks ago and had to call out. Not to mention another girl at my work is 2 months pregnant and I'll have to watch her belly grow like mine should have been and get sad everytime I see her. I'm sad and mad and just plain frustrated but Im also determined to have another baby and have a happy healthy pregnancy. the dr said to wait a month and have a full period again but at the same time I'm ready and determined to try as soon as possible. I'm young (28) and healthy and not sure how this could happen to me and never thought it would.