This is kinda long but I need advice

I gave birth almost 6 months and my fiancé has been in and out of work for most of this year. I am a stay at home mom and I honestly think i’m suffering from postpartum depression. Anyways my fiancé always says little things that makes it seem like he’s suspicious of me for no good reason. He’ll call me multiple times throughout the day which I don’t mind because I be bored and miss him but he always says “your hair didn’t look that bad the last time we were on the phone” or just little things that makes it seem like he thinks i’m doing stuff behind his back. We had major trust issues last year because he thought I had things going on with my male coworkers while I was pregnant. He’s done small things like put a voice recorder on my phone while i went into work and later that day he he listened to it and thought i told on of my managers that I loved him (which i didn’t and would never) he almost fought my managerand i was so embrassed I walked out and quit the next day. There was another time when he left a phone recording facing towards the door and made an excuse saying “he left it on the couch and it must’ve fell” like i would be stupid enough to believe this. But I got over because it was months ago but I took a bubble bath while he was at work yesterday and he said i was being weird because i never take baths before come home and was acting like i did something wrong. Anyways today I was crying for like an hour then he facetimed me and asked why my hair down now when it was up earlier and i was like i didn’t realize then i was like what’s up and he was like this that type of stuff that make me feel like you be doing stuff then said he didn’t want to talk to me anymore so I got mad and hung up on his face. This type of stuff makes me think we won’t last because he always acting like i’m doing something suspicious so what should I do? I need some advice.

Edit: I know he’s not cheating on me because if he’s not at work, he’s at home with me. And we have all each other passwords, when my phone dies I use his with no problems and vice versa because we don’t have anything to hide.