Hypertension is a thing - so do take care of yourself
I try so do things as inspirations flows. So, sometimes I’ll have an idea for a sketch and do a SUPER rough sketch of it but not necessarily have the motivation to actually draw it right then. But I know I got the idea down so I can come back to it when I am ready. Maybe trying something like that? 
And then, if you go blank, maybe have a 5 minute dance party. That way you’re not forcing yourself to do anything, you’re not staring at a blank page, and you’re getting those endorphins pumping (which could actually help a lot in the long run with positive association)
And remember that this is supposed to be fun? So what can you do to make this less stressful? Storyboard with googly eyes? Listen to a comedian as you draw? Play your favorite music? Listen to a podcast? Only eat your favorite snack after you’ve drawn for 30 minutes? Maybe have 1 or 2 non-artist friends who will go crazy and gush all over when you text pics of your rough sketches? (It’s a wonderful ego boost, honestly - I text my art to my sisters and they’re super supportive
)
I think I’ve actually mentioned this to you, specifically, before, but scientists have done studies and to hit flow state (which is the BEST), you need to be working at
FOUR PERCENT EFFORT
That’s it. 4% - anything more than that is going to feel insane and overwhelming if you try to do it for too long. Obviously we all need to learn and grow, and pushing ourselves is good and healthy. But in SMALL bursts. Try to find that sweet spot where you’re getting results and not constantly pushing yourself to the point of frustration.
Random related side note. I don’t know if I ever experienced flow state until I started playing around with alcohol inks. They’re a lot of fun (and messy) and it’s hard to do anything except abstract art (unless you’re using a paintbrush). So I started using these inks that just do whatever they please to make this art that is whatever you want it to be. And it was amazing. Because I was finally able to let go of that “this is what it’s supposed to look like” feeling and just enjoy doing art. Abstract isn’t even my “thing,” really, but I absolutely love making those abstracts for the freedom it gives me. And after doing that for a while, I find that I’m able to work on other projects with a lot more leniency to myself. I’ll have more ideas. And more joy. So, maybe, try finding some form of something that helps you experience the joy without the expectation or fear of failure.
Sorry for the novel
I just get really passionate about all of this.