I have thick creamy reddish brown discharge lately it smell. What does this mean ?

Hello to all .. needing some advice and possible clarification . trying to conceive for a while now . friend told me to try out the opk digital 4 day tests with smiley faces , bought one for this month of Jan 2015. Started to test on Jan 17 got a empty circle low fertility then on Jan 18 got a straight smiley face peak BD all through Jan 15 - Jan 22 and on Jan 24 again . I m kinda irregular lately but gyno said to base it on 29 day cycle with a lethal phase of 14. On the 22nd of january 3 thurs 2 dpo had some brownish to reddish streak in my underwear when using washroom have not seen it again only that one time . Been having cramps mild with lower back pain and some pelvic pain as well.Then on jan 26 6dpo again a streak in undies and when i wiped with TP. Then on feb 3 14dpo again only when i wiped light brown with alot of creamy like cm 3 to 4 days before AF. Been having alor of creamy cm , cervix is high tender and soft but it was low at one point and tender and soft .

I recently I had a UTI I took medication for it and it went away. Then afterwards I m having unusually white thick discharge with no smell and some itching, I put anti itch cream on my vagina and it stopped. But not I m having dark brown reddish spotting or discharge. I do take birth control and have been for 5 years and I am sexual active. Can you please tell me what s wrong?