Am I pregnant or something else?

[hailsalt]

The first day of my last period was June 15. I've had usual symptoms of pregnancy (I've been pregnant before-no complications) heartburn, naseua, fatigue, and acid reflux.
I've taken several hometests and all came back negative.
I've also had some bleeding. Nothing major to take me to the hospital and also not enough to say a period.
It first happened a couple of days after my due period when I had sex with my husband. It was very light pink. And then the same the next time. (about a week or so later)
The third time (July 30) my husband and I had sex there was a little more blood than before and it kind of caught me off gaurd and has had me a little more than freaked. It looked a little more red than pink.
Today, with no foreseeable reason, I spotted a little bit which was slightly brown and pink.

I'm not sure what's normal or what's not. I do know I'm fairly regular with my menstrual cycle being 28-30 days so something is definitely amiss. But with nothing but negative pregnancy tests I'm not sure what to do.

[purple1234567]

False negatives, when taken after you would be more than 4 weeks along, are pretty rare- but they can happen.  If your last period was June 15th, it sounds like the negative is probably accurate.  Late periods and spotting can happen for a large number of reasons- pregnancy being only one of them.  It could be that your hormones are a little off for other reasons, or stress, illness, etc could be causing things to be a bit odd.  It won't hurt to head to the doctor and just let them know about your symptoms to see if they can give you a more accurate picture of what's happening- they can also do a blood test for pregnancy, just in case that negative is a false negative.  Best of luck to you!