Just wondering if you could give me some insite on a possible pregnancy.

I had unprotected intercourse using the withdrawl method on July 27 and 29.

I had lighter that usual period only lasting about 3 days and medium to light flow on 8/3.

On 8/6 I had unprotected sex again using the withdrawl method.

On 8/14 I noticed some clear, slippery vaginal discharge with a hint of pinkish/brownish blood.

As of today 8/15 I am still having the same vaginal bleeding with some slight cramping on my left side. Is it possible that I could be pregnant, my cycles are normally between 25-30 days, but I have had some horomonal issues in the past with hypothyroidism and low progesterone levels. So I am not sure I always ovulate during the "normal" times of 14 days after last period. IS it possible I could be pregnant??