18 weeks preg is this normal!!!?

ok im 18 weeks pregnant and last night i went into the kitchen to have a fag so i had my fag came into the sitting roo and sat down,then i heard the washing machine spinning so i asked my hubby who had put the washing machine on and he said i did it and i really cant remeber puttin it on all i remeber is closing a cupboard door where the washing is as its inside a cupboard if u know what i mean,and then this morning i was washing dishes and ive put the sponge somewhere and cant remeber where it is now,hope this makes sense sorry if it dosent,is it normal to do things like that when pregnant?its been playin on my mind all day about the washing machine askin myself if its normal sorry if its long will pick best answer and 10pts thanks