Hello dear
Understand your concern
Possibility of
pregnancy is less as your sex was protective. If you ha sex one week after at that time ovum is not released so chance of pregnancy is less.
Wait for period as your cycle is irregular. If period will delay by 24th june then you have to think about causes of delayed period like pregnancy first.
Then go for urinary home pregnancy test to confirm the pregnancy and or blood HCG as it is very sensitive to diagnose the pregnancy even before one week of delayed period.
Other causes of delayed period in absence of pregnancy should be rule out like:
Hormonal imbalance: should be diagnosed by reproductive hormone profile analysis. In absence of pregnancy, period can be induced by giving
progesterone preparation tablet/injection.
Ovarian cyst/PCOS: can be diagnosed by USG and reproductive hormone profile. Period can be regularize by
contraceptive pill and ovulation can be induced by clomiphen citrate.
Change in dietary habit and life style, loss and gain of weight,
thyroid problem should be rule out.
Hope this may help you
Best regards
Dr. Sagar