This is our second month trying. I have always had a 28-30 days cycle except for the last 3 months it went out of whack.. sept- 33 day, oct -24 day and nov- not yet. My last period was on oct 10th. So I was expecting my periods on 8th of nov. I tested again on 11th it was negative... since the 33rd day I have been having brown spotting. I thought it was the start of periods... 2 days later today still no ful blown periods... these spotting is dark brown to light brown not enough to come on the panties... I c it only when I wipe... am I pregnant?

I can't tell if you are pregnant, only your doctor can.

You do not mention your age. This is important as there are hormonal factors involved.

Also, have you ever been on birht control? If so, for how long, and what kind? How long have you been off?

Stress of trying will also cause these problems.

I am 25 and I was never on a pill.. we just started trying the since September... We were always charting my temperature and being careful...
The reason I am anxious is because I read a lot and read a lot of ectopic pregnancy.. if I'm spotting could it be that? Or can implantation bleeding occur this late (36 days)?

This is what I have learned about implantation bleeding, so I doubt it is that.

There is a slight chance that it is ectopic, and I mean slight, however, it is possible.

You probably should make a doctor's appointment.