I feel like liquid is getting into my crowns on my front teeth.

I would call your dentist's office and explain your concerns.  I feel certain that they will want to get you into the office and evaluate the crowns.  If they are leaking,  they will likely replace them with new ones.  Good luck.  

If you feel that the recently crowned teeth are creating issues for you, should return to your dentist in order for him to examine the new crowns. He may elect to take an xray to verify that the crowns area sealed well and that you don't have any problems with leakage of any fluids/bacteria, etc.

It is unlikely, if the crowns were place properly, that they would get fluid under them.  If not place properly this is possible and not a good situation.  I would suggest you talk to the dentist and let them know of your concerns.  They will be able to evaluate the situation and let you know what needs to be done, if anything.  Good luck!