u/DepressedCocaine

So I started my second month on sertraline now , my first supply was from a brand called crescent i was starting to feel a little better and now this time the pharmacy gave me a brand called flamingo and i took its first dose yesterday and i have been feeling much worse with a massive headache and wasnt able to sleep properly at all and have a migraine like headache , i have migraine too its not as severe as an actual one but its similar

Is this normal? Should i contact my doctor?