I don't think it's too fast. I've taken a similar path--got certified over Thanksgiving last year (SSI), then went on a Caribbean cruise in December. By the end of the cruise, I had 13 dives. In January, I began more classwork, taking underwater digital photography, night diving and limited visibility, and enriched air nitrox. In February, I took my First Aid/CPR class through Red Cross so that I could take stress and rescue. I went diving the last weekend in February and did the OW part of all the courses, except Nitrox (broken compressor), and passed them all. That gave me 18 dives.
This weekend, I'm going diving again and plan to work on my skills and just have fun. I will be doing more photography, also. I did take some additional classes in March and April, including wreck diving,but won't be doing anything for them this weekend.
So, based on my experience, I don't think you're going too fast. I was a little apprehensive about the OW portion of the stress and rescue, but I handled it fine. I had to take it in February or wait several months and didn't want to do that. If you're comfortable with what you're doing, then continue. If not, take a break and have fun.