late period

Ladies I need advice! My boyfriend and I have been trying for 2 years and 9 months, we have been using pre-seed for the last month. Just finished our first bottle and I am officially 4 days late on my period but I do not feel sick or pregnant. But I have been extremely stressed out lately over house hunting and other things(if this affects my time of month at all, idk). When did you ladies take your pregnancy test when using pre-seed and finding out you were pregnant? Please send advice and baby dust my way!! 😄