Really tired again- normal??

[Em1503]

Hi, I'm now 18 weeks and for the last couple of weeks have been feeling normal again, no sickness etc. for the last few days I've been so tired again, like I was in the earlier weeks. I've had to have a nap at some point in the day for a few hours and been sleeping loads at night time! Iron levels were fine when tested. Is this normal and has anyone else had spells of tiredness at this stage?

Yes I'm 17 weeks and the sickness/nausea has gone but the tiredness has come back. Not as bad as it was but I suspect it's due to being less comfortable at night and having poorer quality sleep.
I've also been on leave from work this week and have missed the routine - I've been very lazy/lethargic!