If my period was due for march 14th and this spotting start march 24th could it be implantation bleeding even thou it was for 14 days?

Unclear information: If you had sex since your last period and you missed your period by 4-5 days, do a home pregnancy test. If the result is negative repeat the test 4-5 days later unless you get a period by then. Use first morning urine and follow the instructions for the test carefully. If you do not wish to be pregnant, use contraception all the time, every time. You may consider implanted contraceptive, or IUD. Practice safe sex.