Mylan Birth Control

Any other mommas on Mylan oral birth control and still get pregnant? It’s one of the only birth controls I can be on being that I have a clotting disorder 😕 I usually still get my period on it and I’m about a week late now... I took a pregnancy test last week because I was feeling off and it was negative. But this week I have been extremely tired, constantly wanting food, and having discharge which isn’t normal for me. Is it worth it to take another test or are irregular periods and stuff like this normal on oral birth controls? Sorry for all the questions, this is my first time being on an oral contraceptive and I’m looking for advice 🤦🏼‍♀️