You’ve been given plenty of advice already, but, yes, you need to identify your problem areas, and then think of ways to improve them. When I first started out, if I was having problem with Boxer jab pressure, or Bison scissors pressure, I would immediately go look up that character’s frame data after the set. I would figure what is safe, what isn’t, and what my window of opportunity is. If I had problems setting up damage opportunities in a game (which was an issue for me in the beginning, as well,) I would think of all my possible options. Did I have trouble 'cause I got hit by Bison st.mk pokes all the time? What would be a good response to that?
For instance, one thing I came up with to do that was, after I blocked a scissors, he would usually do a st.mk. If I anticipate it correctly, I could focus dash through, and then do a command grab. And that’s my approach to roughly anything I have problems with. I try to gather the technical data, then try to break down my options in the exact situations I have problems, and then simulate the different scenarios in my head.
I’m not gonna say this counts for everyone, but most of my damage comes from conditioning the opponent while trying to retain some form of unpredictability in my offense. Frame traps, baiting, anticipated focusing through pokes/projectiles and throw game kinda work together in creating combo opportunities, I feel. It’s not enough just to learn the combo, BUT, you have to learn the combo before you can apply it, so you’ve got the first steps down, at least.
You are probably afraid because you haven’t broken down the exact options and gamble that’s being made in that time. From my experience this hesitation has to do with lack of knowledge and particularly, match-up knowledge. You need to know your windows of opportunity, what your potential choices are, and the risks/rewards associated with them.
Additionally, if you play online, safejump setups alone usually net you safe combo opportunities half the time, I find. But if you start relying solely on that, you’ll quickly fall into another slump.
Hope some of this wall was useful.