Goodness, 150 is a lot of strips - I was using about 70 strips per week before I got my Libre, now probably nearer 50 per week, but it does vary quite a bit from week to week (especially if I have a dodgy sensor, then I'm likely to use more). I get 200 on prescription every 3 weeks.
I often have 2-3 hypos in a day, and was told I should be aiming for that many in a week - presumably you must be having a lot more if you're testing that much? Do you hypo at night as well as during the day?
As others have said, it does sound as though something is wrong in the balance between your insulin and your carbs if you're having that many hypos, though it could also be the interaction between your diabetes and your other autoimmune condition (I have ME and that often effects my diabetes, so I know that this can happen, even when you're doing everything right). But it does sound as though you may still be having too much insulin. Which insulins are you on? Have you been told to cut your basal or just your bolus doses? When I was first diagnosed they put me on 16 units of basal and I was waking up hypo every night - when they realised that they cut it to 6 units (and I'm now on 5), so sometimes the original doses you're put on need to be quite drastically slashed, rather than just dropped slightly.
If you don't already have a Libre I'm pretty sure you qualify for one on the NHS, because testing more than 8 times per day is one of the criteria. How is your hypo awareness? Loss of awareness is another criteria - do you still get symptoms whenever you have a hypo?
Sorry for all the questions - the more we know the more likely it is that someone here can help you.