Is this just die off or a real illness?

Hello all,
I have been doing a parasite cleanse & following the candida diet for about 3 weeks now. Started off just the diet, have added in coconut oil, grapefruit seed extract, diatomaceous earth about 2 weeks ago. Felt like I was coming down with a cold. Added in Black-Walnut & Wormwood complex 8 days ago and for the past ~5 I have felt very sick. Tired all the time, achy, like I have a chest cold (coughing up mucus), and worst of all very bad sinus pressure and headaches, constant. Also have not been sleeping well and waking up a lot. Yesterday I passed what looked like a fair amount of parasite pieces but I am not sure exactly what to look for.

I don't know if this is all die off symptoms or if I could have something else (feels like a cold but worse) because a lot of sickness is going around this time of year. I don't want to go to the doctor if it will go away on its own (if so-when?) but I don't want to leave a real, unrelated illness untreated.

Thank you.