I think my husband is cheating

So me and my husband have been together 8 years and have 2 kids together I recently gave birth to our little girl.. however he has been actually very very shady. He takes his phone to the shower, to the toilet when it's charging it has to be right next to him faced down he always seems to be hiding it.. he has had 3 phone calls this morning all which he has gone outside to his van to answer.. I've asked who it was he said it's work related. He said he was away to watch football just now however before leaving sprayed heaps of aftershave.. my gut is telling me he is cheating but how can I confront him about it