Hi there, I have understood your concern. I will suggest you the best possible treatment options .
First of all do not panic.
The very first and important sign of
pregnancy is a missing period.
Brown
vaginal discharge per say can't be considered as sign of pregnancy.
As you might be knowing that even if there is penetrative sex without ejaculation, pre ejaculation secretions do contain some sperms.
So I will suggest you to wait till the expected date of cycle, and if you happen to cross your dates, then please get morning's first sample of urine tested for pregnancy. In case of doubt blood
beta HCG test and USG will be of help.
Even if you are pregnant, you can opt for termination of pregnancy with medicines safely till 9 weeks of pregnancy under medical supervision.
I hope this answer helps you.
Thanks.
Dr. Purushottam Neurgaonkar.