Frequent headaches in first trimester

This is my second pregnancy and it's very very tiring to take care of a toddler which is 16 months old and having nausea all day round. I am also having frequent headaches and have to resort to eating paracetamol. Feeling ultra guilty after eating since I know I am supposed to be avoiding medication at all during first trimester. Other natural methods don't help in resolving the headache and I am really feeling so guilty and depressed. I am only at my ninth week and still got at least three weeks before the nausea will subside. I can stand vomiting all day but I can't stand getting headaches. #pleasehelp