Trying for a baby HELP!!!

Hi All, I don't know if you can help me. I am 26 and trying for my first baby. I had a miscarriage at 5 weeks in January 2011 when i had this miscarriage 9 days after ovulation i had a implantation bleed and i was told that was normal . The doctor said we could try again straight away after MC. I had a normal period last month. I am due a period again this Thursday and i woke up this morning and was bleeding again but it has stopped already, could this be another implantation bleed or is it to close to period and is it a sign that i could MC again. I am so desperate to be a mum but don't know if i could go through the pain again has this happened to anyone else???