Upped Citalopram dose..Feel awful

Hi

So yesterday I finally plucked up the courage to up my Citalopram. My doctor knows my fears of taking tablets so suggested going to 15 mg by buying a pill cutter and cutting a 10mg in half to take along with my usual 10mg dose just for a week before going up to 20mg. Took the new dose before bed and as usual started having an anxiety attack and fell asleep (eventually) feeling awful..Woke up this morning and my god I feel horrendous.Can’t even get out of bed I feel so weak and exhauted. It’s now 3:15pm and I’m still here in bed slept on and off all day and only getting up to go to the bathroom, feel so unsteady on my feet like i’m really drunk. Family members have had to do my school runs today just can’t pull myself together. I don’t know if this is because of the upped dose or the hightened state of anxiety I fell asleep with last night I just feel like the life has been sucked out of me today 😞