Help I'm scared

Hello ladies

I have pcos and my doctor put me on yaz bc and metformin to regulate my periods and help me eventually ovulate i'm about to finish my first yaz bc packet i just took my first white pill.but on monday i got my period with clots I haven't got a period for years i taught my period looked kind of normal but on Thursday evening my blood clots were ridiculous they ware huge if i sit down for a bit and get up huge blood clots come out i have to change my pad so often... is Sunday night and is still the same should i be concerned? Has anyone experienced this on yaz! Please help i feel exhausted ,irritated i stayed home all wknd since i can't leave that bathroom :( I taught my period was supposed to come on white pills not before!!!!