White coating on tongue

Hi mummies! I’m in my 10w2d today and realised I’ve a white coating on my tongue (especially after meals) and doesn’t seem to be scraped off easily. The taste in my mouth is not metallic but somehow sour and bland. I cannot taste much of the after-food taste that lingers in my mouth like I used to. I’m unsure if this is Oral Thrush because I googled the symptoms and I don’t have it on the roof of my mouth, gums, tonsils. It feels so irritable… does anyone know if this is normal? #firsttimemom