Hey guys, just some back story

I'm 25 years old and healthy; I've been studying a lot for grad school and using a lot of adderall; I've noticed that I've developed some performance anxiety over the past few years in relation to this and I'm not getting as hard as I used to (adderall shown to cause ED due to both psych and circulatory effects). I'm able to get hard, but not how hard i used to get. And I have trouble staying hard roughly 5 minutes into sex due to performance anxiety (I know this because I don't really have a problem when I'm with a partner I'm comfortable with for years).

Anyway, I got a free trial for Blue chew (Sildenafil 30mg chewables). I've read some horror stories online and have hesitated trying it. I wanted some advice had a few questions..

  1. Biggest fear would be Priapism. Before this ED issue (which is entirely psychological) I used to get hard ons for hours with no problem.. I'm just scared about the anxiety afterwards if the erection doesn't go away knowing my history plus the fact that I don't have a physiological issue causing the ED. I was thinking of literally taking a nibble off of the 30 mg pill (maybe 5 mg 10 mg tops?) would this extremely low dose decrease my chances of this?
  2. Also, how does it work? I'd have sex with my girl at night, and aftewards, do I just go to sleep? Does the boner go away right after? Or just stay for awhile? Should I not go to sleep and monitor it? I heard it was bad to go to sleep incase it doesn't go away. I'm just concerned with what's gonna happen post-sex as I sit there and worry.

Sorry guys this is embarrassing even though its anonymous -__-. I've been having ED due to psychological reasons alone and its affected me a little. I used to be able to have a rock hard on for hours at a time no issue. I'm just really tripped up on that fact that I'm young and healthy with no circulation problems that I could be prone to Priapism/other complications. I'm just worried about the anxiety after sex as I sit there and worry for 5 hours if my boner doesn't go away or something, and I feel like thinking about it would make it a situation even if it wasn't, ya know ?

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Do you guys think that If I just take a nibble (maybe 5-10 mg) at first to try it out, I'd be ok? I definitely would not take the entire 30 mg chewable at once for my first time. So I'm trying to get myself to take a nibble of one of the chewable before sex next time...I just haven't been able to bring myself to do it yet. I'm Just looking for some advice from others when they tried it to first time because this is all very new to me.