First dose administration and don't think I'm going to continue

I was really excited about this and got a 3 month supply. Took my first 2.5 shot 3 days ago and I've had every side effect listed. I'm a healthy eater, so I was surprised at how hard this has hit me. I slept for over 14 hours last night, have had non-stop diarrhea and vomiting since I started, and feel like absolute garbage. I've eaten grilled chicken breast, salads, sprouted toast with PB, tuna with fennel and arugula. All of it has made me super sick.

I've read the posts about dietary changes and such, but I'm not sure what else I can do besides trying to go lower or split the dosing into two. Either way, this has been so hellish that I'm not sure I'm going to continue. Super bummed.

Any thoughts/ideas? Please give me stories of hope!