Hair Emergency

I need help with a very disgusting issue.

About 2 months ago I decided to try the no shampoo approach (I absolutely do not recommend it, the dangers are grossly understated). Before going the no shampoo route I was washing my hair every 7-10 days. My hair produced very little by way of natural oils originally. It never smelled. It always felt clean. I have coarse, plentiful, wavy/curly hair. For every hair follicle I have 2 to 4 hairs so I just have a lot of hair. I was using organic products, no sulfate blah blah but it was getting super expensive. Anyhow since I started my hair has started to produce some mysterious substance. It is a very solid fat, it is not oil. This fat is not well distributed through the hair and I cannot get it evenly distributed brushing, combing, massaging, ignoring nothing works. This substance collects massive amounts of dirt and so my hair is absolutely, disgustingly filthy 10 minutes after a wash. It does not smell bad thankfully, my roommate is non stop sniffing my head so I guess it has a nice scent but the hair is so gross. Despite being covered in lard my hair is still frizzy and coarse. My scalp is not irritated at all. No itching or redness. My scalp feels pretty good so it does not seem like the follicles are clogged. I have tried now washing my hair with shampoo but it does not help. I cannot find anything that will break down this substance. It can’t be product build up because I wasn’t using products so what is there to build up? I have been working around trees a lot, maybe I have sap mixed with oil or something? How do I get out sap? Lard? Will it be necessary to shave my head? Is this just how normal hair is? It can’t be that awful, I would rather have horse hair as before if this is what hair feels like. Do I have a disease? I have seen no improvement at all in my hair. It certainly looks and feels worse. Because of the grease it is even harder than before to get wet. I have oddly very waterproof hair, like a duck or something. I have to submerge my head for a long time and it still never gets fully wet.