I feel the Spirit in a variety of ways, normally dependent on the specific situation that I currently find myself in. Sometimes I feel an overpowering feeling of warmth. Other times I feel shaky all over (in a good way), and like my limbs are full of pins and needles (as in the sensation you get after an arm or leg has fallen asleep). At times I'm brought to tears with the power of emotion I feel, and then there are other instances where the Spirit is the barest impression at the back of my mind. The constant in all these different situations is that they are all positive experiences, promote me to do good/be better, and seem to come from an external source from myself.
To help better illustrate how I feel the Spirit, I'm going to relate a couple of spiritual experiences I've had in the past year.
Some months ago, I was pondering a lot over a question pertaining to what direction I should take my life. I had gotten some answers previously, but was unsure if what I had received was truly from God, or just my own thoughts. It seemed as though I had been given certain promises, but the content of those promises just seemed so far-fetched and illogical that I couldn't see how they could have possibly come from God. One evening, I was turning this over in my head yet again when the words suddenly came into my mind, "Why do you doubt?" The thought came in my own voice, yet it had completely interrupted my current train of thought, and felt foreign. I am sure that was the Spirit speaking to me, because 1) that thought did not originate from me, and 2) it promoted deeper trust in God.
Last semester, there was one week where I saw flyers hanging up all over that were advertising TA positions for a specific department. The deadline for the applications was listed as the upcoming Friday at noon. Throughout the entire week, every time I walked past those flyers, I had this weird certainty I was going to get one of those positions. This feeling persisted despite my decision NOT to apply, because I didn't think I was qualified enough to even have a chance. Anyways, less than 24 hours before the deadline, I changed my mind and scrambled to get my application completed on time. Lo and behold, I am now working as a TA in that department. Again, I know this must have been the Spirit, because the impression I got was in direct contrast with my personal thoughts, therefore it must have originated from some divine source. Considering this impression was good, I know that divine source must have been God.
I can't always distinguish whether an impression is from God, or merely from myself. Sometimes, I only realize that I was feeling the Spirit in hindsight. This makes me think something that could help you recognize the Spirit would be to reflect on the good choices you've made, or times when you felt truly happy. What gives you the motivation to keep on trying, even when you don't seem to see the results? How did you recognize that your testimony was struggling and decide to try and remedy that?
Sometimes the way in which the Spirit works is by encouraging our righteous impulses, which is more subtle and thus harder to recognize. But it doesn't mean that you're any less in tune with the Spirit than if you had had some major declaration.
Hopefully something I've said here is helpful to you. If you want to talk more, please email me at firstname.lastname@example.org.