Job issues

I feel so angry today when my colleague ask why I cannot carry heavy items/ bend down when he clearly knows I’m pregnant. Alright to be fair, most guys don’t know the woes of a pregnant lady, all the more he’s single. I guess it’s time to let my manager know about my pregnancy since I’m alr 12+3. Had such a difficult time trying to avoid all sorts of work that require heavy lifting and long standing. Maybe I sld have just inform from the start when I knew I was pregnant but I was superstitious. Such an agony because people only understand things from their point of view. They may label me as ‘difficult’ and ‘who does she think she is’ trying to avoid responsibilities. Well they can say/ think all they want because ultimately why should I risk my unborn child and myself just for a job? Although I still need to ensure I do not get tortured by people before I go for my maternity leave 😒