DD is 5 weeks old today and is now completely f...

DD is 5 weeks old today and is now completely formula fed. She is on s26 Gold AR and I have just started adding thickener to it to help with vomiting and thought it'd help with the fact that she is ALWAYS hungry and regardless of how much I feed her won't sleep until she is over full. I started out BF which I stopped at the start she was having one long feed of 4-9 hours at night and then started during the day as well. I then mixed bottle fed her and she was drinking 150-200ml of EBM and then 60-120ml of formula all in the one feed. Now I've put her on formula she is having the 120ml (plus the thickener) as stated on the tin and maybe once or twice a day this will be enough to mostly she wants more. I try to only give her another 60ml but more often than not she is still hungry. I know she is hungry because she tries to attach to anything she can (my chin, nose, ear, arm), I also generally try to wait about 20 minutes just to see if she really is actually hungry - Sometimes she will complain and then go to sleep. So after giving her 240ml of formula in the last 2 hours and she's still sooking at me hungry I just want to know if there's such a thing as feeding her too much or do I just keep giving until she's had enough?