please someone help, i went to the doctors today and the doctor said it could be 3 things.....and didnt test for anything as she is sh*t!!

i was due on my period on the 25th.....missed it and on the 29th i got pink discharge that then turnd a orangy/pink at night
the next day ( 30th ) it was light and light red..1 pad worthy
on the 31st it was a little bit darker in the afternoon with a few tiny clots and then a few hours later it there was 1 little bigger clot ( a bit smaller than a 5p ) but still a very light flow...used 1 pad all day which had hardly anyhting on it!

the 1st september ( yesterday ) same colour red and it was not really pad worth, it was just like 2 small lines on the pad

today i havnt really bled its just there when i wipe and i havnt used a pad and there was just 1 little spot on my knickers.

I must note that my periods are 3-4 days long at heavy bleeding and really bad cramps and loose bowel and my moody swings and my tearfulness ends the day my period starts

But i have had no cramps ..very light bleeding for 5 days so far and really bad constipation and have been so snappy and emotional

my doctor said it could be 3 things..preganacy.....change in period....or a infection...
i no i havnt got and infection and i no this is not a noraml period do u think i could be pregnant?

much appreciated to any reply