I might be pregnant anyone had a similar experience?

Okay here goes... any help or previous experiences shared would be most appreciated...

I am 30 years old and suffered a miscarriage @ 9 weeks 25th April 09.
I had a complete miscarriage, no medical intervention was required.
I have been trying for a baby since my miscarriage, despite being advised by the hospital to wait a few cycles.

I was told to expect my next period between 4-6 weeks following my miscarriage. I stopped bleeding from my miscarriage around the 4th May. I am not sure how long my cycles are, but I am regular, maybe 28-30 day cycles.

I have been having unprotected sex with my partner of 7 years since my miscarriage and I think I may be pregnant again.

Week beginning May 25 I had very mild cramps for a week, and the following week (1st June) I had little brown spotting for 7-9 days... on one of those days the spotting was a little bit heavier (bits of dark red blood / brown) but this didn't last long...just for one day, I was using a tampon and it was three quarters saturated with brown / dark red blood.

My spotting ended Mon 8th June. I have had frequent headaches during this time and following this mild cramps. My right leg also feels very tingly on times and I am passing urine frequently. Following my spotting, I have had mucus discharge (sorry for TMI), no sign of infection of anything.

I have taken a pregnancy test yesterday which came back negative. But then I am suspicious that my hCG levels wouldn't have been high enough yet due to possible implantation. I have also searched the net for infomation and found it quite helpful, although because of my miscarriage I am finding it difficult to tell if I have missed a period or if my brown spotting was 'implantation spotting'. The spotting I had was definately not a normal period for me as normally I am extremely heavy from the onset for about 3 days then fradually getting lighter, normal period lasting about 7 days in total. I did read a post in another forum and a few woman who experienced brown spotting in early pregnancy for about ten days and that it is possible to spot for this long and still be pregnant.

I guess, like all you ladies, the waiting is extremely frustrating...has anyone else experienced the same thing as I have and is there a possibility I could be pregnant?

I didn't experience implantation spotting in my first lost pregnancy, just really sore breasts and extreme tiredness, mild cramps.

I am going to leave it a week and see how I am and take another test.

Any advice?
Lots of love and baby dust to you all
Claire xxx