yes these are the movement dont worry its the most precious thing to feel Good luck
Looks like it is the ligaments stretching. Your uterus has to grow more than a hundred times to accommodate the baby. The ligaments supporting the weight of the uterus get stretched and likely to give you sharp stinging pains when you get up or begin to move.
The baby's movements should initially feel like bubbles popping, or like popcorn around this time. Most first time moms start to feel the baby's movements around 5th month. I also started feeling the baby move around end of 5th month.