Brother, Masha'Allah, you have chosen the "exoteric" world against this visible and selfish world - Allahu Akbar. Now that you have come into Islam, you have to be very steadfast as they say that satan runs in yoru bllod. Time to time you will have stupid thoughts, sometimes you will feel like hopeless, most of the times you will be "coaxed" into thinking negative.
This happens broter, stay firm, steadfast and start to read Islamic books, but also have to be very careful what you read, always discuss with your Sheikh or companions, there is a lot of "off-stream" litereature available that is does not portray the religion of Islam.
