Dental care on a 340€ monthly salary

Hi all! I am currently working as an au pair in Amsterdam, earning 340€ per month. I have basic health insurance but dental isn't covered. I have tooth/gum pain thats been going for a week and I think I need to see a dentist. Do you know how much it will cost to get it checked out by a dentist and pay direct for a check up? I really can't afford dental insurance, I've seen it's like 100€+ a month just for dental insurance. Thank you!

Edit to answer some questions: 340€ is the legal max I get paid. Even if it's considered "pocket money", it still has to cover all my hygiene products, health insurance (my agency signed me up for one that even after toeslag costs 40€ a month and I can't change it), phone bill, public transport when taking the kids somewhere (I know this isn't standard but the agency aren't super active in helping me change this), and putting some in savings and then still enjoying the purpose of this culture exchange too. I don't live with my host family, I live in a room with a kitchenette and shared bathroom a minutes walk away that they provide and have dinner 2 times a week with them, other than that I eat alone. Because of the dinner arrangements, they provide around 50€ a week for all my food for me, but that has to cover toilet paper, cleaning supplies, etc, which add up over the month There are a load of expenses and I just can't fork out hundreds of euros for a simple dental check up right now, so I appreciate everyone's advice and help, I have a much better idea about what it's going to cost, and a load of resources to try out and tips, thank you to everyone who's commented!