Sorry i ment to say after the 12 week mark... not the 13th...
No its most likely not baby at this point as the baby is extremely tiny and its limbs are just starting to bud out... doesnt even really look like a baby yet and is about 1/2 and inch at this point(blueberry)... they say around the 16 week mark is when baby has enough force for you to feel it for a second time momma and i wouldnt think anatomy wise (both for you and baby) that AT LEAST till after 13 week mark... It is really easy to mistaken gas and even muscle spasms for baby as there is a lot of changes down there and these feeling may feel new or different...and these feelings can feel like a flutter feeling or even thump, which is a very common description of baby
I'm not totally for sure its the baby your feeling yet..its still so tiny..but I'm not a professional so anything could be possible!! Lol..;-) this is my fourth and I knew for sure I was feeling him move at 12 wks!! My first flutters I think were actually gas! It took awhile b4 I could really tell the difference.!! =) congrats on #5 hun!!!
I think the baby starts moving sometime in the beginning of the first trimester. So I do think so considering you are on number 5.