Severe food allergies and ttc??

Has anyone ever experienced sever food allergies while pregnant or trying to get pregnant? I’ve been dealing with unknown food allergies for about 6/7 months now, (it’s happened about 5-6 times) very sporadically and out of the blue eating something different each time. I get violently sick and hives(reaction is different each time, sometimes swelling sometimes not but I get sick and hives each time). Benadryl usually works great to make it stop within an hour. I’ve had to get a steroid shot once but I was traveling so I couldn’t get in to see an allergist. It’s been so sporadic that I’ve held off and started eating better but then it pops up. I’m calling allergists tomorrow to try and get seen but I wanted to see if anyone had any experiences. A family member (who is a PA) suggested celiacs as being a possibility but my main concern is we are ttc, I just ovulated so it could very well happen soon. I’m planning on holding off on ttc next cycle until it’s taken care of but as for now, there’s nothing I can do if I end up pregnant this cycle, 3dpo) I had my first reaction in 2 months yesterday, I honestly thought I had it under control.