Confusion on moles. Stop their growth?

So few years ago,I developed a mole on my back and did not pay much heed to it because it didn't have any pain or it was not growing.basically i did not realise when it got there and since my mother has a mole in almost the same area of her back,I thought may it's genetic but cut to 4-5 years down the line,I just suddenly was checking and saw that not so far away from my previous mole a new mole has grown and another bump is there on my upper arm which seems to be something that will soon be developing into a mole but it's not dark yet.and  all three of them are not very far from each other. I wanted to check on the Internet as to a reason for such growth and it said that it might be early signs of Melanoma.now I am scared and freaking out.I wanted to suggestion as to whether from the attached pictures of the moles that's there on the post, should I further get it checked from a dermat or they look like simple moles.& if it's simple mole,are there any way to stop their growth ?