Haven't heard from my BF [26] in a full day, can't tell if I'm overreacting.

Title says it all really, he was texting me all weekend up until today and now radio silence after I replied to his text. I feel like a 14 year old freaking out but if you're in a relationship with someone would it not be normal to hear from them at least once throughout the day.

He's said before if someone doesn't have ten seconds to reply to a text in a full day they can't really care that much so that's worrying me. I'm not expecting a full conversation or anything so I don't think I'm being needy. This issue has never come up before but I really don't want this to happen frequently, just wondering would I be overreacting to talk to him about it. I really don't want him to feel like I'm telling him to do but I'm just not into a relationship where we don't talk for days at a time.

tl:dr worried because I haven't heard from my boyfriend all day, can't tell if I'm overreacting or not.