I had my period on June 28th and July 31st, and my period cleared in five days every month.
Hello, according to your situation there is a possibility of pregnancy, the last depends on the situation of menstruation if delayed for more than a week can be tested to see if you are pregnant
If you are pregnant, you should have regular maternity checkups, and if you don't plan to have one, you can terminate the pregnancy after the ultrasound clarifies the intrauterine pregnancy.
Generally the first day of menstruation will not be pregnant, because it is a safe period, ovulation is usually about the 9th to 18th day of menstruation, so avoid intercourse only at this time, at the same time you can monitor ovulation to have sex, it is best to wear condoms to avoid accidental pregnancy.
According to your time projection, the chance of pregnancy is relatively low, so you should not worry too much, but if you are really worried, some people ovulate and menstruate separately, in this case, you can go to consider emergency contraception
June 28th to July 31st is about 34 days of menstrual cycle, more than 30 days. July 31st to August 3rd is about the fourth day, this time intercourse is not pregnant, because the follicle has not developed yet, there is no ovulation.