Work related trouble because I'm pregnant.

I work at market basket (grocery store ) and I stock shelves . My boss today told me once I get a doctors note saying I can't lift over a certain weight that I'm basically worthless to the department .. And There's no work for me to do . So which means im going to get no hours to work.  Which I do not find fair because multiple girls have worked and go into labor There while working ..  Not sure what's so different about me .. Do you think I can collect unemployment due to my manager not going to schedule me anymore ... Help!!  Remind you im only 12 weeks !!