I may have scienced too close to the sun

I am not new to baking bread but new to sourdough. This is Clint Yeastwood and things kind of got out control. I did not have a large not metallic bowl as my cook book suggested so I started with a plastic jar. Well...things got out of hand and I had to give Clint yeastwood 2 sons, the yeastie boys. I have no idea what to do now. The recipe said stir 3 times a day for about 7-10 days until fermented. Have I fucked this all up? I'm just using what I have available, no cheese cloth and plastic seemed to make things more bubbly so switched to parchment paper because that's all I have on hand.