If i have hsv2, partner doesn't, lost twins and right tube due to ectopic & now i'm 6/7 days late. can i still conceive and could i be pregnant now?

Yes: And you need to see a doctor right away to get a preg test and rule out a tubal pregnancy in the other tube.

Yes: Yes to both. See your doctor and get a pregnncy test if no period in another week.

Yes: Your period is late and you need to do pregnancy test today as you are at risk for a left tubal pregnancy. You may have a normal intrauterine pregnancy , but ectopic needs to be ruled out asap. Hsv2 has nothing to do with this.