Hello,
Welcome to icliniq.com.
I read your query and understand your concern.
Firstly to get pregnant, the sperms have to be released inside the vagina of the female. Secondly, these sperms then need to fertilize an egg which may or may not be available depending upon the ovulation pattern of the female. Thirdly the fertilized egg is required to be implanted in the uterus of the female. When all this happens successfully, then a female is said to have conceived, and then the periods are missed.
So in simple words, for a high probability of pregnancy, the intercourse has to be unprotected and penetrative (or contraceptive failure like condom rupture, etc.). As I understand, you have had unprotected intercourse but not penetrative, so here I would like to tell you that sperms do not survive in the open for more than a few seconds (maximum 5 minutes rarely) to travel from outside the vagina right inside to fertilize an egg. So you are safe.
Further, on day 2 of menses, the ovary does not release an egg, so again there is no possibility of pregnancy even if sperms have been released inside the vagina.
Depending upon the details presented by you, pregnancy is ruled out. There is no risk of pregnancy. Secondly, the absence of pre menses signs and the possibility of delay in periods could be due to-
1. Stress is responsible for the delay of periods in 25 % of females worldwide.
2. Travel also delays periods.
Since you are stressed and hence asking the question so similarly, your partner also must be tensed, and now that her pre mense signs have not surfaced so she must be under a lot of anxiety. All this is responsible for the delay of periods and associated signs.
So you need to assure her that everything is fine and her periods will be soon there. But since she has had some irregularity in her periods, we can examine her separately to ascertain possible causes.
Feel free to ask any further questions or to share any additional information.
God bless.
Thank you.