I had a miscarriage about 6 month ago and after I had it about a month later I had my period but its not been about 4 to 5 months and I haven't had my period but I've taken 2 pregnancy tests with in 2 weeks of each other and they were both negative.now its going on 5 or 6 and I haven't had my period my boyfriend thinks 5 but I think 6.im scared and I want to know what could be doing this?
And when they looked to see if everything came out with the miscarriage they told me that everything way out,but like I said after the 1st period I had after the m/c I haven't had another one for about 4 to 5 months?

Too little information, too many questions. Your age, how far along the miscarriage was, birth control being used, etc. Go back to a gynecologist. You could be adjusting hormones, you could be pregnant and getting false test results or doing them wrong, early menopause, any number of reasons.