Bipolarnurse has given you great advice on this.

And remember that now that you are on meds you are much less likely to go into mania and if you do, it should be less severe then when unmedicated. Just make sure to take your meds exactly as directed. Don't skip doses or reduce them in any way.

Mania usually builds slowly starting with hypomania before going full blown. It might help to think back to what you felt like just before full blown mania and write down your symptoms.

For me it starts with sleeping only 5 hours a night because I wake up earlier. Excessive and impulsive purchaces comes next. Then I start talking more than normal. I start making more plans and feeling overly positive about my capabilities. This is the verge of full blown mania for me.

By knowing what it looks like for you in the very beginning, it may help you to ask for help before you get to the stage where you simply won't recognize that it is happening.

And as BipolarNurse suggested, it helps if you can share with people close to you what those early symptoms are so they can point out any obvious behavior changes that they see in you before it is too late.