I feel like I'm being replaced. :'(

I am currently pregnant and we are in our third trimester. This is our 3rd pregnancy, we miscarried the 2 pregnancies prior. I have noticed that our sex life has not been what it used to be. When I've tried to talk to my husband about it, he always says that he's so stressed out from work and that It's hard for him to perform. However, I have noticed that he watches porn often. Sometimes he will lock rooms in our house and use his phone or the computer. I always thought that porn was something that guys just do. I've even tried to talk to a close friend of ours, who is in a committed relationship, and he told me that We should definitely consider getting marriage consouling. With my body changing and my self confidence not where it used to be, it's hard to feel like you have to compete with these porn stars. I've been wearing lingerie and little panties and thongs and he'll just say "you look nice" and that's it. Its almost like he'd rather pleasure himself watching the porn then being with his actual wife. I've tried to talk to him about it several times. The first couple of times he got so mad and defensive about the topic. I wasn't judging or trying to attack him. Heck, there were times I even tried to watch porn with him and I'm not into that stuff. But he made it seem so awkward with me being there. I've offered going to the adult store to get some things to spice up the bedroom for him, I thought maybe there were some sexual fantasies he wanted to fulfill. I was game to do anything, except a three some. I'm not doing that😂. I've even been reading about how to improve your blowjob skills. Like I'm really trying and it is frustrating. It's almost like the porn has a hold on him and I don't know what to do to help him or our marriage. All this started happening about 5-6 months ago, so it has progressed pretty fast. I've been praying, fasting and trying to figure out what to do. I've even asked him if he's afraid of intimacy because of our pregnancy problems before and he always tells me no. To be honest I'm not sure where I stand right now nor what I should do... It really does take a toll on your emotions and your psyche. Any advice or suggestions ladies...

*And please don't post "At least he's watching porn and not cheating."

1. Not everybody feels that porn isn't a big deal.

2. Even if you feel that way about porn. Small problems can turn into bigger problems quickly.