yup.
Cold not so bad now as warmer weather coming in, but have had my fair share of sitting at PC with gloves and hubby jumper on over PJ's
Tiredness, comes and go's, found it was worse in weeks 2-3 where I was falling asleep on bus etc, but it does goe. I still occasionally toddle off for a wee nap, but its literally 30 mins to a hour and only If I have time. Its not like if I don't have that nap I'm going to collapse. Its more a comfort measure.
help the tiredness? I would say just keep going as normal, don't over exert yourself and take some down time where you can. Be kind to yourself