Randomly starting to lose a bunch of LP and gaining 0 after having perfect lp gains for like 4 weeks

Im furaha a D2 NA player and recently i hit d2 again for the second time had normal lp the first time and as i was at 78 lp d3 or so and gained 11 and had to win twice to get into promos i thought this was very weird considering i was gaining like 23+ every win basically i did duo with my friend for 4-5 games and we won not sure if that has an effect but i get into d2 and i win 3 games = 39 lp total which is honestly silly. then lose a close fought game and lose 32..... rito pls helperino