Pre term labor

OKAY ladies I was in pre term labor at 28 weeks last night at ER, cervix is still closed thank God. Gave me a shot to help baby lungs just in case i go early. ONcall ob did not write me off work or anything. I have a labor intensive job on my feet 8 hrs a day, running my tail off. Should I be concerned they didnt write me off work and put me on best rest? Should I call OB on Monday to check? I was having contractions in stomach and back and having chest pains. ? Also FTM