There’s not enough info to say, but it doesn’t seem good so far. I think you could do with more skills so you can verify this for yourself. We have tutorials I have linked for you before on how to identify impostors and parasites, but you might need to work on the skills to implement these.
It’s common for parasites to make you feel great at first to get you hooked. Once they are attached they don’t need to try any more.
I’m not saying this is the case, and as I said, it’s only been a few days so it’s too soon to be sure.
The tell will be if you start feeling weaker and weaker as well as not getting the results you wanted. If it’s a parasite, deal with it sooner rather than later though, as you can start to lose motivation and energy to perform the work.
You do any banishing you prefer, and set your intention to only banish unwanted and harmful spirits. Your intention is the tool to direct your energy.