Possibility of conceiving

Hi! I would like to ask if it's possible to get pregnant 3 days after my period? My menstrual cycle is 35-38 days. I've been using <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> for a year already just to track my menstruation but I haven't tried if its <a href="https://play.google.com/store/apps/details?id=com.glow.android">fertility tracker</a> is effective.. I feel so worried.