Pcos and my first period

A

Sooo November the 1 I went to see a new doctor.. she told me it’s really bad to not have period.. my last period was probably about.. 3-4 years ago.. and I’m 24 years old.. she started me in metformin and birth control.. she told me that my first period was going to be a hell of a period.. I start the metformin and BC that same day... well about 3 days ago I started spotting nothing major just some blood when i would wipe and still just spotting not enough to get on my pad tho.. 1 thing I have noticed tho is that the blood coming out looks really red like fresh blood but it smells awful.. even when I go to the bathroom and open my legs I’m like “lawd... what crawled and died in there” it’s not like a fish smell or a vagina smell.. idk how to describe it... do you guys think my periods will eventually get stronger or should I call my doctor? And should I be worried of the smell??