Brown spotting when period due

Hi,

My period was due to start yesterday, the night before I had extreme cramping and abnormal discomforts though i was not alarmed as inknew thatbmy period was due the next day, on my period due date instead of getting the heavy (I have had extremely heavy periods all my life) I just just had very light brown spotting. day two its a bit more than spotting, though still really only need a panty liner as its really that light. Throughout the past two days it's felt like a normal period, at times I've felt pressure in the pelvic area, cramping etc, but really next to now blood.

To give you a bit of background of my cycle, my cycle is always regular and I track all my symptoms using period tracker as my partner and I are trying to conceive. Also note that I'm not or have ever been on the pill though I have just started taking BM conceive well gold.

We had sex day 5 days befor, 2 days before and the day of my ovulation. Though this would make it seem that I could be pregnant though I haven't experienced normal pregnancy symptoms (tender breasts, morning sickness, etc), I also took a pregnancy test today (official week four) and both came up negative.

I've been doing some research and following the three below possibilities;

- breakthrough bleeding - I'm pregnant
- early miscarriage
- hormones changing
- ....?


What do you think, I know that it's common for ppl who are trying to get pregnant to cause symptoms etc, though I've never had a period like this and am slightly worried that it could be something much worse.....