If you have symptoms of Covid-19, please visit our Coronavirus Symptom Checker. If you have had Covid-19 symptoms for more than 4 weeks OR are concerned about ongoing symptoms, please click here. For more information about Covid-19, the vaccine and new variants, please visit the Welsh Government and Public Health Wales websites. For general information including Long Covid, visit our Health A-Z.
Some women's cycles are not exactly 28 days. If your cycle is shorter or longer than 28 days, please adjust the number below.