Period was 4th-11th august. According to this app I had sex on the 11th, 14th, 17th and 20th. The 17th being a high 30.1 percent chance to conceive.

For the last 3 days I've and pulling sensations in vigina and lower ab area. Early Yesterday during the day i thought I could see a hint of color when wiping after going toilet then around 4pm when I wiped there was bright red/pink blood. (Nothing since then) This has never happened before, what could it be?

Period due 2nd sept.

Any help would be appropriate 😊

Thanks