Wrongfully Terminated Due To Pregnancy

I want to preface this by saying, I don't want my job back by any means. I was planning on quitting in the coming months but I honestly just feel so wronged with how this turned out.

I worked at a very popular coffee shop, one that is often referred to as more of a cult than anything. They have a policy regarding "gossip" where if you're caught talking about another coworker, personal matters etc, you will be COACHED. Now I've never been coached, written up or given any warning in my entire year and a half that I was employed there. Multiple people have been coached 5+ times regarding gossip and still work there.

This all came to a very weird head yesterday when I received a call from my operator to inform me that due to an off shift conversation I had with a coworker about a falling out of a friendship, it would be best for us to "part ways." Okay, cool, not a big deal. But this came a day after I mentioned to my manager, who is also my operators (owners) wife that me and my partner were planning on being pregnant.

I spoke to her about this to request a reasonable accommodation during the summer months to not be outside for long periods of time, next to hot cars taking orders and overheating. She got kind of weird, shutdown and told me she'd have to talk to her husband. Not even 24 hours later I was fired.

It seems pretty obvious to me that this at least had some part to due with me planning on being pregnant. My only regret is that I didn't record the conversation, because I didn't think that's something I would ever need to do.

I've reached out to my operator regarding this and he told me that it has nothing to do with me being pregnant etc, which is hard for me to believe. I again reached out to request our regional managers contact information and a copy of any termination paperwork to be sent to my email, to which I've been met with complete silence. This also denies me access to cash tips that I've worked for that were left at the shop.

I ended up sending an email to the general HR department (which I had to search extensively for as we've never been given access to the contact info.) I let them know what happened and requested information on how to remedy this situation and have heard nothing back.

I'm just curious if this is something I should bring up to the EEOC or if anyone has any other advice they'd recommend for me. I'm planning on contacting another employee that was fired that has a kid to see if she has any evidence or experiences with them discriminating against her as well.

Thanks in advance, and for reference I reside in Tennessee!