how do you know when your dose is too high

I started triz right after Christmas, and have not gone up from initial dose (2.5) because it seems to be working just fine- I'm now on week 7 and have lost 10% of body weight.- maybe it's working more than fine? I have a hard time eating enough, and battling a lot of nausea. Tried all the things (water, protein, eating when I don't feel like it, but that makes it so it just wants to come right up). I don't have enough energy through the day. I'm considering skipping a shot or lowering my dose. The place I ordered from is fairly bare bones, so I don't see an option to talk to a provider. My question is: is anyone on here done that? Any advice? Please don't just say: talk to your doctor. I'm okay with listening to my body, doing some research online, and hearing from others in similar situations. Thank you in advance!