Well, from the information you gave sounds like it would be your red blood count that was low and 7 is low. Blood volume has no correlation with a white blood count.
You definitely should be closely followed-up with by your physician and definitely discussing any concerns with him/her. I nor anyone else here can tell you if this will or will not affect your heart again. In other words....we aren't treating you. Consult your physician about this and get this sorted.
I haven't took a pregnancy test. I was never told if it was my white or red blood count that was low. I am just worried if its going to affect my heart again.
The above situation shouldn't be affecting your period. Now, a low red count can correlate with heavy periods, but that is not the case here.
A low body fat percentage can also affect cycles as so can stress; causes that can stop cycles other than pregnancy.
Have you taken a pregnancy test or had a pregnancy blood test done?
I was two weeks late and when it did start it was like it was barely there. I have never been late. Not even when I was pregnant. The last time I was pregnant I found the day after it stopped. Unfortunately I had an miscarriage a week later.
What exactly is going on with your periods?
In July of 2011 I was hospitalized because my heart almost stopped because of lack of blood. I was told my blood count was a 7. I was wondering if it was happening again causing my period to be messed up
"Low blood count?" What exactly is low? What lab are you referring to?