ADVICE ANYONE ⁉️⁉️

Me & my boyfriend are trying to have a baby. We had unprotected sex on Oct. 7th-8th , Oct. 13th and Oct. 19th. I've taken 2 pregnancy test and both say negative 😔 I took one a couple of days ago and I took one just now. Should I wait longer ? My fertility window was the 13th-19th. Can anyone help ????????