TTC for 5 yrs now...

I've always wanted to have kids close in age but for some reason it's jus not happening for me that way, that's prolly a good thing but I still want to have more kids before my son gets any older than he already is n he's 5 going on 6 come October. I've always been irregular n I've nvr been able to keep track of the monthly visits cuz they come sporadically n sometimes I'll go 6 to 9 months without a visit... in October 2010 I miscarried n it seems I haven't been able to get pregnant since. Two weeks ago I started off having extremely sore breasts, then I was dizzy off n on so I assumed I jus might be preggers but to my dismay on last Sunday I began bleeding n it was heavy, heavier than usual, n lasted all the way to today with all days being extra heavy up to this past Sunday. I saw a doctor today n took a pregnancy test n it was negative (I assumed maybe I had another miscarriage cuz I experienced the same thing when I was preggers the second time), so I'm going to go to my obgyn in two days to see if there's something wrong; I pray that I don't have cysts or endometriosis but the way my body is wrkn lately there's no telling what's going on or why I jus can't seem to get pregnant *sigh*... jus wanted to share what I'm going thru.