So I had my regular periods from 14th June to 20th...

Regarding the effectivness of morning pill :
effectivness of morning pills reachs to 70-80%, so in case of expected regualr sexual intercourses , its advised to use regular OCP such as Yaz or gynera 
regarding your next ovulation days :
if you are asked regarding previous period , you are most likely to already passed it , its expected to happen between 10-14th of july , but regarding your next period, we cant answer you precisly as we are not sure about your regular period duration 
regarding being pregnant :
its advised to use home pregnancy test after 1 week entering next period or use blood pregnnacy test in first days of entering next period time 
How to know ovulation days and the safe days in period :
1. ovulation time or the time ovum exist are the first 4 days of the last 16 days of the period , for example ;if your period is 28 days , and  if your first day of period was 1st/9 , your ovulation time is 12th-16th /9 
2. the ovum last 48 hours in the uterus and can get fertilized any time during this period of time 
3. male semen lasts up to 5 days in female uterus and will be able to fertilize during this period of time , but the earlier the better 

you are welcome , thanks for using our website