Lifting, legs shaking

DancingMoosie

Hi! I am somewhat new to weight/power lifting. I started training with a power lifting team, just following parts of their workouts, but now work out on my own or with a friend. I progressed gradually to around a 135lb squat, 175lb dead lift, and 100/105 bench. I feel that I am struggling with these weights, even though I have done them for a few weeks now. My legs shake, especially the right leg, when squatting and dead lifting, and my bench feels difficult. Its as if I'm weaker instead of stronger each time. I usually do a pyramid workout, twice a week. 8 reps, 6, 4, 2 with the weight increasing each set, then back down in the same pattern. I do circuit training, cardio or yoga (all videos) in the morning, weights in the afternoon on M/W or T/TH then auxiliaries the other 2 afternoons or cardio or circuit. I take Friday afternoons off. I do videos or go for a run on the weekends and Saturday is my pull-up day. I think my quads may have a weakness that needs to be addressed, as this is where they were shaking and got really sore this week. We had to skip 2 days between weights to let my legs recover. I have gained a few pounds, so not worried about being under in calories. Any ideas or advice? Specific changes or exercises to add?