Our little terrorist is 17mths old now , I want to get back to work and send her to daycare , but i have 2 concerns

1) she is VERY attached to us , especially me , we have been with her non stop since she was born , only left her with grandparents for a few hours a few times

2) we speak polish at home , and my husband doesnt speak any english. We want Aneta to learn english , but we dont want this to effect her polish ( which she is slowly learning to speak now)

has anyone had a similar situation? is it wise to send her to daycare yet? is there a chance she'll learn only english and not speak polish?
We plan to have a rule of only polish when speaking at home ( like i had when i was growing up ) but im still worried the english at daycare, and polish at home might confuse her enough to stop her talking