Fatigue and nausea 3rd trim

I remember being soo sick, nausea, headache, super tired during my 1st trim all the way till 18/19 weeks. Afterwards i feel soo much better, no nausea, i got my energy and appetite back. And now im in 3rd trimester, i feel like all the things i felt in 1st trimester is starting to get back at me. Im always very tired, and get tired easily. I can be quite nausea, and sensitive esp when brushing teeth, in the morning or when im full, not to mention the extra belatedness altho i dont eat much. 😭 To add on, i feel like my feel is being squashed by the weight of my body/tummy everytime i walk or stand i can really feel the weight on my feet. Like when you carry sometime very heavy Do you experience it too @ 3rd trim? #FTM