two periods in a month on lo loestrin

i’ve been on lo loestrin since december and it got regulated really fast and since february my period was very normal and it came on time and everything. i missed my period in april which i know it’s normal for really low estrogen pills. i got my period two weeks ago but i just got it again. i haven’t missed any pills and i’m always within the two hours of taking my pill. i never had irregular periods not even before i was on the pill so i’m confused. why could i have gotten my period again? it’s not implantation bleeding because it’s really red and it’s the normal amount of blood for period blood.