Recently my doctor upped my SSRI dosage, need advice

I’ve been on 20mg citalopram for two months now. I can feel I’m on the road to recovery but I know I’m not there yet. feeling a lot better about my situation. But I rang my doctor to get my tablets as i was running out and she said that because I’m not feeling 100% better at two months in I need to have my dosage increased to 30mg citalopram. Does anyone have any thoughts on this? Should I keep doing the same dosage or listen to my doctor? They’ve given me a box of 20mg and a 10mg box so I could keep my regular dose going and not tell them. I really don’t know what to do 20mg side effects are bad enough already