My midwife advised contacting the doctors as a week of antibiotics is required (the guidance for pregnant women has just changed recently) - they really helped me. I didn’t actually have to go in, just a quick phone consultation x
I would contact the doctors because pregnancy thrush is not the same as normal thrush and you may need longer treatment. Many over the counter medications are not suitable for pregnant women
If you're pregnant you should definitely go through the doctors. I had thrush when I was pregnant and I had to have antibiotics alongside the cream
Canesten thrush cream, you’ll find it in the medicine aisle at Tesco, Sainsbury’s etc