My E levels dont make sense at all.

Back in october I got a blood test done and clocked in almost 700pg/ml on 2 pumps of oestrogel a day. My dose was then lowered to 1 pump a day, which gave me problems with headaches and dizziness and we got a test done and it went all the way down to 30pg/ml and i was then changed back to 2 pumps a day. Now I got another test done and got 40pg/ml results. All my tests were done pre-dose. Idk how this even happened. The super high result could've been a fluke, but going from 30 to 40 seems really weird. I wonder if should bother with taking another test. Tbh I think upping my dose to 4 pumps a day wont even be enough if that 40pg/ml is true.