Could Headaches And Nausea Be The Side Effects Of Over Dosage Of Paracetamol?

Over the space of 2 days i ingested roughly 14g of paracetamol and i am not sure what to do it has been more than 48 hours since first ingestion and around 30 since the last i have not experienced most of the symptoms of paracetamol overdose and have only suffered from headache, nausea and a slight fever which i think is a result of the codine which were in the 8/500 tablets this did not happen in one go and each day roughly 7g was injested at max also the total is less than the theoretical toxic amout using toxic dose per kg