I was re-checking my claims above and found that fenugreek can cause something called serotonin syndrome. You may have been experiencing the very early stages of that or you are very sensitive to fenugreek. I am sensitive to several herbs and in the past, I did read that they can an affect like MOAI and I am sensitive to that. I will feel jittery like I had too much caffeine and they can keep me up at night. Or it could simply be an allergy.
If you want to read about fenugreek or want to see the side effects of serotonin syndrome see the links below
https://www.mskcc.org/cancer-care/integrative-medicine/herbs/fenugreek (see side effects)
https://www.mayoclinic.org/diseases-conditions/serotonin-syndrome/symptoms-causes/syc-20354758
If you want to read about fenugreek or want to see the side effects of serotonin syndrome see the links below
https://www.mskcc.org/cancer-care/integrative-medicine/herbs/fenugreek (see side effects)
https://www.mayoclinic.org/diseases-conditions/serotonin-syndrome/symptoms-causes/syc-20354758