Promethazine (Phenegren) Anyone taking it?

I have HG, 28 weeks, and was just curious if anyone else is taking it. If so, how often are you taking it? I got a prescription for it back in December (90 tablets) to be taken as needed. I finished all of them and called my nurse to get a refill. The nurse refilled the prescription but was shocked I was still suffering from HG. When she saw that I had taken 90 of them already she asked how often I was taking them. I only allow myself to take 2 a day if that. Some days I don't need any (not very many of those days) and some days I may only need one. I try my best to battle through the nausea and vomiting but some days I can't function. I guess my question is does that seem like a lot of pills from December 16th to today? I just want to make sure I'm not overdoing it. Oh and the instructions are that it can be taken every 6 hours but like I said I will never take more than 2/day if I need them .

TIA