Should I be worried???

So my period has been kinda crazy these past few months and have been abnormally Irregularly. I had been taking a birth control for the past 4 months and would have the pills shipped to me. The company that would ship these pills to me had a lot of shipping issues and would always send me my pills a few weeks late! The pills also made me have some pretty bad symptoms like headaches and nausea. I decided to get off the birth control and start a new one and I just recently started about two weeks ago. It’s been going fine and I haven’t had any really bad symptoms. I’m just concerned on when I’m supposed to get my next period since I have been switching birth controls and haven’t been able to take some in a few weeks. Should I be concerned??