I was on birth control but stopped bc forgetting to take it on time and irregular bleeding, do i need to wait for my period before starting it again?

Yes: Yes, you want your cycle to be regular staring at the beginning of a new month, as you usually do, will avoid unnecessary hormone fluctuations and not force your body into an unnatural cycle, causing a heavy, painful period next month. Put it next to your alarm clock so you don't forget every morning or bedtime. If you continue to have breakthrough bleeding, you may need a different pill.

Try another method: If you are regularly missing pills, they're not going to be as effective. If you're sure you're not pregnant (no sex), you can restart the pills, but i'd strongly suggest you consider a long acting method such as the implant or iud. Mothered methods are very effective(as effective as sterilization), easy, and long lasting.