XR with Beta Blocker?, lower dose | ADHD Information

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I will try to make this as easy to follow as possible.
Objective: to figure out options for my dosing--

I started Adderall XR in October. Started on 10mg once a day with a 10mg immediate release later in the day. This was working and eventually worked up to 30mg XR in the am.   I talked to the doc about my change in my classes and that I have mainly evening classes now. So I started on the 30mg XR and 20mg XR...then oddly I started getting an extra hour of sleep each night. So lately I'd take the 30mg, and then the 20mg and be up until about 2am. I didn't like that--I sleep fine w/ it and I need my sleep because of my arthritis and osteonecrotic hip pain.
Long and the short of it, I didnt' end up taking many of the 20mg XR.

The problem is this -- I feel like a pile of crap this semester. I feel like I'm in a cloud and dont' get much done. I have a list that I need to do, I start a project and the day is gone, and I don't feel like I've accomplished anything (hyperfocus most likely) I feel like I sit in a trance most of the time.

The recent problem is this -- my provider is only in this particular office once or twice a month. How she has it is that on a certain date (around the 15th) she'll leave the Rx at the office for me to pick up. I picked up a script on December 19 dropped it off, got to my house and noticed it was the immediate release--called the pharmacy and it wasn't written for XR -- took about a week to get the new script sent, filled, and picked up. January script was picked up on the 19th, noticed that it was once again not written for XR. Fast forward to now, 3 weeks later, still don't have the correct script, stories arent' matching, secretary is rude and won't relay my messages or the messages from the pharmacist--so as it stands, I have some 20mg's that I've been taking or the messed up immediates...since this swapping around the increased heart rate is back. It's randomly in the 90's to 120's, and I run in the low 50's usually. So I am assuming that is causing part of the 'pile o' crap' feeling--
so, this is what I think my options are

1) take the 30mg in the AM with a 15mg Immediate release in the afternoon
2) continue with the 30 and 20 XR
3) take the 30mg to a 25 (20 wasn't enough) and a 10 immediate release.
4) add a beta blocker?

besides getting a provider in the office that will write the script for me that is full time and trying to figure out things, I need to get stuff done---I feel like I am always saying "no idea where today went, no idea what I did, but I know I was 'busy'.

Does anyone else have the tachycardia intermittently? do you use a beta blocker? what does it feel like?
For me, since I've lost 30 pounds on the adderall, you can see my heartbeat at my abdominal aorta, I feel a strange muscle spasm type of feeling / pain in that same area. No chest pain. Activity of any sort during that time puts me over the edge (and I use to be incredibly in shape, tri-athlete)

so here I am today, it's almost 6pm, and I've gotten nothing done... dammit :(
any ideas, please are welcome---

30 pounds is a lot to lose. Were you overweight?

My heart rate was around 100 to 115 (even 150 at times) as well when I was on Ritalin. It bothers me. Also, I had BP and it was around 160/95. Not good. I am a very anxious person so I think that makes it worse.