How bad is a relapse?

It really depends how bad your relapse is. 1 time out of 60 days in my opinion is not a relapse just dont binge or get back into old habits of daily or hourly PMO.
Stat strong and dont get hooked you may experience the chaser effect where your brain wants more of what it just felt

 

Some days I was perfectly fine afterwards, other times I'd restart my cravings.

 

First off, congrats on making it 60 days. That is something that few people do, especially those who have gotten hooked on PMO.

My experience is that I often (but not always) feel fairly normal, but a little (or very) sad in the first couple of days after an orgasm/emission.
It's usually around day 4 or 5 that I get hit hard with arousal. This is what many call "the chaser effect".
Worse still is what happens with my emotions. I end up not getting along with people or having hurt feelings. Next thing I know, I feel a very strong urge to MO just to feel better. I rarely think that it's about having relapsed, I usually just think that other people are jerks or that I'm just having a tough day.

This is a very risky period and usually lasts about two weeks after the relapse. You should be in pretty good shape around day 15, somewhat close to where you were at day 60 if you can get there, but be extra careful during this time and expect it to be a bumpy ride!