Implantation or period?

My husband and I are trying to get pregnant. I took a test three days before my missed period (I’m inpatient) and I got a neg test. My period was supposed to start 5/23 but I started to spot the day before. I figured it was just my period but I very lightly (like only when I wipe after I pee) spotted for the 23rd and 24th. I woke up this morning thinking that I would have a full on period but there is nothing. Could I just be too early to show a positive test?