Well done for thinking about this, Leesa! In the first trimester, the baby is very protected by the pelvic bones so you don't have to worry about anything that you do can cause a miscarriage - these things do happen, but it's not your fault. I can understand you wanting to not risk anything though.

Talk to your boss if you are concerned: my boss used to do all my heavy lifting for me (and tell his team to do the same) as soon as I told him I was pg, so they can be very nice and understanding about these things.

Lots of luck and to you for your TTC journey - I hope you join us in here for good very soon.