1cm dilated at 35 weeks 4 days 😕

Have anyone experience this before this early ? My doctor said it’s normal for women who have had multiple kids before but it still makes me nerves.. I got her to check me because I been having a lot of pressure down there like baby is very low well she confirmed that baby is head down and I was 1 cm dilated and she could feel his head but she did say my cervix was still thick and I wasn’t effaced so that was good but it still scared me.. with my other kids this my fourth I did dilate but around 37 weeks when it started but this is to early I think.. anyone else experience this before or going through it now?