Thanks for the query.
If you had unprotected intercourse
around the time of ovulation then there is possibility for pregnancy
Though some of your symptoms are suggesting pregnancy, just because of symptoms we cannot confirm the pregnancy.
In case of regular periods the bleeding you had on 6th could be ovulation bleeding or implantation
bleeding depending on the possibility of conception.
So you wait till 25th Feb and if you miss the periods go for pregnancy test once. Meanwhile you can go for symptomatic treatment.