Husband lying?

I know this is gonna be abit long but I need a third opinion so basically my husband told me he deleted his Snapchat and today I looked at his Snapchat score and it has gone up? So either his still using it or I dunno cuz it can't just go up if your not using it right also I'm 4 weeks postpartum and yesterday I went upstairs and he was in bed and his hands were wet and I go to him why are your hands wet and he goes it's sweat and I smelt it and it was my coconut oil and i go to him why have you used my oil have you been wanking and he goes eww I would never do that are you stupid I got dry hands now me being me I know he was chatting shit cuz that was so weird so I spoke to him and he kept changing his story finally he said I ain't had sex for so long am massaging my balls cuz they feel heavy and I do this all the time. It actually hit a nerve as my emotions are all over the place and I got really upset he doesn't like to have sex either with me and obviously not sexual active as I've just had a baby but why lie? And he is always online on WhatsApp as well btw am 25 his 30 he always says am tired stressed but I don't know and were from the UK