Mixing vinegar with toilet bowl cleaner can potentially produce harmful fumes, and it is not recommended to mix different cleaning products together.
The fumes from this mixture could be irritating to your respiratory system and may cause discomfort, especially if inhaled in a confined space. Inhaling high concentrations of these fumes can be harmful to your health.
If you're experiencing any symptoms such as difficulty breathing, dizziness, nausea, or irritation, I strongly advise seeking medical attention immediately. If the fumes are severe or causing distress, call emergency services.
In the meantime, as you mentioned, keep the door open and air out the washing machine area. Ventilate the space well to help dissipate the fumes.
To avoid similar incidents in the future, always use cleaning products as directed and avoid mixing different chemicals unless the product label explicitly states it is safe to do so. If you have concerns about your health or the safety of using specific cleaning products, consult a medical professional or poison control center for guidance.