Idk should I test!!?

Milah

My ovulation day was on 5/4. According to Flow(which is usually spot on) I was supposed to start my period on the 18th but instead I had light spotting when I wiped only, me thinking its my period I put a tampon in, went to change it later and no blood so I went without. Yesterday the 19th I wiped and a little spotting on the tissue only. And since then still no period and no more spotting. Could it be implantation??