I hope someone can help me verified.

Clues (?):
January - missed my period the whole month. Which do not concerned me because it’s happen before. About once or twice a year I will miss my period the whole month. Totally no pregnancy ever occurs.

Feb - May - had my period as usual in 30-32 days cycle. Normal for me.

June - I started spotting on the 4th. about a week early (my period normally started on the 8th or 9th of the month).

Additional clue: My husband mentioned twice, probably a week or more before my next period (that will be this month June) that my body temperature was warmer then usual. But this noted by touched. I didn't think anything of it because I thought it from the warm weather and the waterbed effect.

What happen was, on June 4th when I start spotting I just thought my period comes early (it happens). On day 3 my bleeding came and lasted 2 days but which I noticed it was less then the usual amount of bleeding from my previous period. But the blood does not stop totally. I'm back to spotting. Which I thought will last a day or 2 before it totally stop as per my previous period. On the 11th day I'm still wondering why I'm still spotting. By the way it was dark brown.
Then on the night of day 11. I suddenly felt a lot of blood coming out. I checked and sure enough. I was really surprised but thought it might be just an overdue period. I did not feel any pain whatsoever. Then about probably half hour or less, I felt something more coming out then just blood. Sure enough, a big blood clot (about the size of a golf ball) came out and another one came out while I was sitting on the toilet bowl while changing my pad because by then my pad were soaked through. Through the whole night more blood and blood clots came out and I had to change my pads several times for it was soaked through every time. The heavy bleeding lasted until friday afternoon with a sizeable blood clot just before I woke up. Then the heavy bleeding stopped to a lighter bleeding.
Today will be day 15 and I'm still having lighter bleeding. But yesterday evening a very small blood tissue came.
Through this I do not feel or felt any pain or illness before and after.

I have never been pregnant before so can anyone verified if I somehow was pregnant and was experiencing a miscarriage? I'm totally clueless.
I'm not seeing a doctor yet because I have not feeling any alarm to do so.