Implantation Bleeding or Early Period?

I'm struggling with trying to understand my body lately. I've been getting pretty regular periods now for a while so it seems easier to track ovulation and menstruation days. I was set to start my period November 1 but on October 29, I had some brown discharge. It was a tiny bit of spotting so I ignored it thinking my period was coming early. Then on October 30, I had more brown discharge around noon, and it was enough for me to use a tampon, since I assumed my full-on period was about to flow soon. A couple of hours later, I removed the tampon and it just the brown "goo" on it, which from my understanding is blood that is old and has had enough oxygen to darken. So, I waited, and the entire rest of the day there wasn't a single spot of fluid. I did some research and discovered that there is something called implantation spotting/bleeding. Typically, after intercourse during the week of ovulation, you can notice spotting here and there if the fertilized egg has implanted into the uterine wall. This happens because when it implants itself, some blood that has been lining up throughout the cycle is shed. I also read that if the spotting is light pink or light red then it means the implantation could be fairly recent. If the spotting is brown, then the implantation could have taken place some time ago, and the blood that was shed is "old" and is just now actually shedding. I read that if it occurs a few days-to a week before your expected period it could be implantation spotting and that if you have a late or missed period, check for pregnancy. I got slightly excited and thought "This is finally it!" and I've tried to cut back on the abdominal exercises and just focus on the breathing and yoga sessions I've been doing, for my own piece of mind.

Well, on October 31, there was still no more discharge until around 3 pm and then there was just a tiny bit here and there when I used the bathroom. Not enough to even wear a panty liner really, so I have been feeling confused. From what I understand, the implantation spotting should be a small amount. Now compared to an actual period, this was definitely a SMALL amount. But to me, it shouldn't have had a little bit each day for 3 days, but at the same time... if it is my period coming early... what is taking it so long? I am just entirely too confused and clearly want that BFP right now. 

Since it is now 1:00 am on November 1, I will give my body a few days to make up its mind and if there is no more discharge and no period, I will take a HPT. My gut tells me that it is just an abnormal cycle due to stress or who really knows? I think mother nature likes to be in control, even though I'm doing all I can to maintain a healthy state of being. Regardless, I am hoping that the lord heard our prayers and that we get some good news. However, if I'm not pregnant, and my period doesn't actually come, I will have to reschedule my HSG test. I'm set to have the test done on Monday, November 7, at 10:00 am. I'm of course, as nervous as can be, and am torn between getting it over with, and putting it off completely. Anyway... just a few ramblings I've had rolling around in my head today... I hope everyone had a safe and fun Halloween holiday! :)

XoXo