I used a ovulation text & it said i was ovulating on the 11th day of ovulation. we had unprotected sex that day. we also used preseed. is it possible that i could get pregnant? last period was on june 14th?

You could. Conception occurs within day or so of the sex. It takes about 3 weeks for the embryo to make enough HCG for a positive pregnancy test. Blood test may be done a day after a missed period. Home pregnancy tests should be done 4-5 days after the missed period. If the result is negative repeat the test in 4-5 days. Use first morning urine and follow instructions for the test carefully.