Husband suddenly weird with phone

[clockflower]

Does anyone have any advice? Since lockdown started, my husband has been edgy with his iphone. He mostly leaves it turned off in the morning bfore work. It's quite often on mute. He says it keeps going to mute by itself?!
I haven't checked his messages as I feel like that would be invading his privacy, but I'm afraid to say that I checked his messenger settings on our shared ipad and he has secret conversations activated. I never use facebook messenger.
He must also have turned off notifications because when I whatsapped him recently he never got it and it was only when I asked him about it that he opened WhatsApp and read it?!
He just seems suddenly different with his phone! What would you do? I don't feel like I can ask him really as there's nothing concrete to say.

Ah I didnt realise-I downloaded mine and i have never used secret messages so it says "no" under this i assumed if you have they would be there

But if you are going to just leave it OP what about your sexual health?
What if he is shagging this woman, I wouldn't be going anywhere near him at the minute.

Op I'm Sorry you are going through this but just be aware people can sneak off during work time for a shag I have worked with both sexes who have maintained affairs this way. she might be young and married but very unhappy so never say never. why does he have her contact details if you hardly know her? Also anyone hiding an affair will make sure they cover there tracks 2 phones obvious one but deleting all correspondence so if there oh has concerns there nothing to see. I hope its not for your sake but keep a close eye on him and her if you can. Good luck