Advice: Shortness of breath after breath hold exercises

Would really appreciate any experienced diver's input on what I'm going through:

I downloaded those apnea apps and did some exercises. Yesterday I did a few breatholds while taking a walk, and then immediately got home and did a co2 table. Since then, i've been feeling out of breath, and not being able to catch my breath. At points it gets better, but after a few hours it comes back. Also feeling a bit of tightness around the throat.

Anyone else ever experience this? I'm wondering if it was a result of the poorly executed breath hold exercises, or if those exercises triggered something else. I also have a covid test tomorrow morning to be safe.

I fully recognize that I shouldn't have started doing breathholds without taking a class. But with Covid and everything that wasn't really an option.

Any input would be appreciated, thank you.

I'm no expert and don't use apps or do any tables or exercises...but I hold my breath underwater a lot...

I've never had anything like what you are experiencing, and if I did I would contact a Doctor...

Hope it is nothing serious.

Sincerely,

Jim

I used to practice breath holding on land to improve my bottom time and my last "record" was 3.5 minutes but never experience the shortness of breath afterward.  If this condition prolong you should see a doctor just to be on the safe side.

I am no expert but I sometimes experience this when I go to bed. Might be from having to build back my lung strength after a surgery not too long ago.
When this happens I take as deep a breath as I can, pause for 2 seconds then slowly/steadily exhale through the mouth until I have expelled as much as I can then do it again, immediately.
It will help balance out your oxygen levels and slow your heart rate down as well.
Two or 3 times in a row and I am back to normal.

It is possible you are having a panic attack as well.

I've noticed that during COVID (where I'm doing way less diving and exercise than normal), my initial static breath hold time hasn't really changed, but I can get way out of breath super fast.  I haven't experienced what you described exactly, but I've experienced all kinds of other weird breathing things. 

I've come to the conclusion that this is either after effects of COVID (and they're showing tons of nasty lung issues even after getting better), or it's me being affected by the lockdown. 

The weird one for me is that when I am practicing stomach breathing, I now find I get quite dizzy.  This was never the case prior to COVID.