Third trimester nausea

I am 28 weeks and nausea is coming back with a vengeance. I can’t eat anything without feeling it and I have so much discomfort. I know theres some severe constipation happening too lol. Is there anything anyone can recommend? So far I can only think of tums. They are some relief. I just feel like crap. If anyone else would like to just complain with me about third trimester symptoms, feel free 😂.