Should I be worried?

Ok so last night my boyfriend said he had to keep his daughter another night while his ex gets stuff done in the morning. That’s fine! When he has her however I usually get lots of pictures and we still continue talking through the night. And last night, I got nothing. He left my messages unread for 13 hours until this morning and said his Snapchat was having glitches or whatever.

I have a history of being cheated on, and I’m not going to lie this worries me a little bit. Should I be? And how do I ask him about it.