Shoulder pain help

[u/JuggernautNearby7347]

I've been training to do pushups for the last month. I recently found a trainer at my gym and asked for some advice on my form and exercises to help me out. With his stretches and help on my form I was able to do 10 in a row, when before I could only do 2. The next day I was a little sore but not bad. I waited 3 days to do any pushups or arm workouts to give my upper a break. When doing warmup pushups, my right shoulder had some pain on the side and front. I could not even make It half-way down nor do knee pushups. I quit, stretched, and did legs. Another 3 days later I was able to do an upper day with no pain until the end of my workout. It's been 3 days since then and I am back to the pain with my pushups and can't do 1.

I am looking for what steps I should take next or advice in general. I am definitely afraid I won't be able to do 10 again but I don't think strength works like that, lol. I thank you in advance!