I'm lying about my periods.
Why would you need to lie about your periods?
I feels embarrassed by them.
Periods are sometimes a stressful event but a normal part of life for females to embrace. Lying about them is not going to change anything, be up front with it all.
I'd rather just pretend that they're not happening.
You should never be embarrassed or ashamed that you are having your period. Don't lie about them, that will just make you feel worse about having them.