Is he cheating on me?

So, here's a tiny preface: We are in a long distance relationship with him being across the world, basically. I'm also currently pregnant and we are engaged. However, after he proposed to me, I found out that while we were apart, he cheated on me. It took everything out of me not to leave, but I forgave him because I really do love him and wanted to give him a second chance. Anyways, I think that I've made a mistake in doing so... Let me explain why. The night before yesterday, we FaceTimed for awhile before he "went to bed." I went to eat with my family, so I didn't check my phone until I got home. Note that he is 6 hours ahead. When I checked, it said he was online on Whatsapp at 9:01 PM - which is 3:01 AM his time. I called him because I wanted to see what he was still doing up. He didn't answer. I texted him immediately after and it didn't even deliver. So, he turned his phone off right after I called - which he has never done. Fast forward to yesterday morning - he texts me at 7:50 AM (1:50 PM his time), which is already strange because he is an early bird and always wakes up at like 8-9AM his time and will text me then UNLESS he went out the night before...  So, he calls me an hour after that text and tells me he's "going shopping" for a suit for his friend's wedding that is next Saturday. I say okay, and he told me he would call me once he's home. I wait for his call, nothing. 5 hours in, I call him. Realized he turned his phone off again because he's not receiving my texts and my calls go straight to voicemail. 10 hours later, he sends me a text telling me he's going to bed. Never even calls to tell me he's home or anything just texts me saying good night. I call him to see how shopping went and just to talk because we haven't talked all day really. He quickly rejected my call and told me to stop calling and then turned off his phone again. Honestly, this is the same behavior he had when he cheated on me back in March-April. I told him I know what's going on and he should just admit to his faults because I'm SO done being lied to. I cried so much yesterday because my instinct is already telling me that he's up to no good again.... We were supposed to get married next month when he comes to visit but I'm sick of all of this - I put so much into this relationship and this is the BS I get. I know that I deserve better and if he doesn't explain himself to me truthfully, I'm out of his life.