first time... please read

Hi guys. I'm 21 and just experienced my first miscarriage. I was 4 weeks and 2 days... bled with horrible cramps for about 8 hours and then nothing but my icy was at 4 so it was confirmed. I think I'm ok. I didn't have enough time to get "attached" to the pregnancy, but I feel betrayed by my body. I know it sounds stupid but we need to trust our bodies to do things right and then it gets rid of my little ball of cells and I'm supposed to just go on and trust it with trying again? anyway... speaking of trying again, what are everyone's thoughts on how long to wait? my Dr said I should wait till after my next normal period. aka 2 cycles. that feels like a lifetime away and I don't want to wait that long. but I don't know if my body needs that time to do whatever. what are your experiences. please share...