Should I take AP Psychology test?

My teacher did not teach well and he would only be able to cover 70% of the materials. I need to do extensive test-prep and self-study with my barrons book to ace the test.
I heard the test was easy, but should I take the test?

PS I got three more AP tests(BC,Bio,USH) to take care about.Is a fourth AP test too much?

I think that you should take it if you are comfortable with the subject. I don’t know what you mean by BC (except for Calc BC) but if you are taking AP Calc, with AP Bio (what I’m taking) and APUSH, I’m afraid that you might not have enough time to study everything, despite you taking Psych. It’s better to get all 4/5s than some 5, 4, and 3. I’m self-studying for this exam at the moment (almost done with most of Barron’s) and in my opinion, the questions online look pretty easy. I say go for it.