ABVD is kicking my ass. Need help or advice

I (35F) was diagnosed with nodular Sclerosis CHL, and I'm currently day 4 after my first ABVD infusion. I knew chemo would suck but I didn't realize it would feel this awful. The constant nausea, fatigue, body aches is making me useless. I haven't pooped in 4 days. Everytime I remember the chair I sat in during chemo or the food I ate that day, I feel this deep dread, i feel traumatised.

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They keep telling me to fight it but i honestly dont know how i will survive this.

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Please tell me it gets better? Is there anything I should be doing to make it easier for my body?