WDYT old formula

cynnichinny13

I consider myself one of those moms that worries too much. I try to be laid back with MILs opinions and things that she does, or that my mom does. That being said. MIL made DS a bottle while we were at her house (we were playing in the 'playroom' and she offered) I told her the formula and everything was in the diaper bag. I later found out that she had used some enfamil formula that we gave her a little while back... That stuff was opened a few months ago & hasn't been fully used. The containers all say to use within a month of opening... Should i be worried? i'm not really upset or anything about it because DS is fine. But is it OK or should i be a little upset?

I think I'm just worrying too much but let me know.