Hmm, you've only played 4 games.
It's a common story that after a player studies a lot they try playing and are playing worse. This is because it takes time to incorporate your new knowledge into your play. After you get used to it you'll have better results.
No I play on a other site also, and in my last like 20 games I lost like 14, where before I didn't apply anything good and was way weaker I often got 10 win streaks in this same rating. I get the whole one step back 2 forward thing when you try to apply new things but my losses occur in simple tactical things and out of the blue my opponents in the same rating giving me way less blunders to take advantage off. I didn't expect to be much much better in 2 weeks but I for sure improve especially in the tactical department so to all of a sudden lose to weekend warriors on a weak site in that regard makes me extremely frustrated since it makes no sense.
2 Weeks into studying chess seriously going from knowing 0 about the game to getting much stronger at tactics doing hours of them on the internet and books designed to make you see them, watching some fundamental videos to get a better understanding. Even tho I feel like I apply more solid fundamentals in my play, I all of a sudden start losing against players I beat pretty easily before applying any basics and with weaker tactical skills and all of a sudden out of the blue magically their skill improved with me over the last 2 weeks with HOURS of study giving me a hard time in low rated games. It's really frustrating and makes me feel like hanging myself instead of pieces (metaphorically speaking that is).