I don't think there is such a thing as "too much insulin". We all have different insulin requirements depending on our weight, activity level, stress level, body composition, hormones. It is a very individual thing to find the insulin doses that are right for you.
So the better question to ask is probably "is this the right amount of insulin for me?" If your blood sugar results are in range and you don't have problems with hypos then there is no reason to think it's too much insulin just because it's a high number.
A TDD of 88 might not be that unusual in someone who is 200lbs + and under a lot of physical stress factors (other illness or medication) or pretty sedentary.
Diabetesnet.com has got a total daily dose estimator so it uses age, weight, activity to tell you the average TDD, but remember, you aren't average, you are you, it's fine to not sit in the average so long as your doses are working well for you.
However, if your blood sugar readings are out of range or you are getting a lot of hypos then it is probably worth investigating whether this is the right amount of insulin for you.
You can do this investigation by:
1) basal testing to see if your levemir keeps you in range -
https://mysugr.com/basal-rate-testing/
2) having a look at your insulin to carb ratio -
http://www.bertieonline.org.uk
Are you on fixed units of novorapid with no carb counting? Do you find that you have to eat to your insulin to keep your sugar up?