Anti M antibodies in blood

Hiiii I’m 40 weeks and 3 days over due. Just been told today they’ve found anti M antigens or antibodies in my blood (that weren’t there in previous tests) . I’m A+ blood group. Anyone know what this means for me and baby?? I’m finding little information online. And still waiting for consultant to call me back to explain. Getting very anxious. Any info would be welcome thanks

Xxx