Thanks for the query.
As you are having 35 days cycle, the ovulation may occur on around 20th day of the cycle.
So, as you had unprotected intercourse
around this time there is possibility for pregnancy
Though some of your symptoms are suggesting the pregnancy, just by symptoms we cannot come to one conclusion.
So wait till your expected date of periods and go for pregnancy test to confirm the pregnancy.
Start taking folic acid
tablets from now-onwards.