So, if I wire two 100mah cells together to make a 7.4v 200mah pack that wouldnt be good enough?
No, you cannot get a 7.4V 200mah pack by wiring two 3.7V 100mah packs.
If you wire them in parallel, you'll have a 3.7volt 200 mAH pack. If wired in series, you would have a 7.4Volt 100mAH pack.
Voltage is additive in series, current is additive in parallel.
You should get an inexpensive multimeter to measure your cells, this would have indicated your polarities.
I don't know the "C" value of the cells you plan on using, but AtomHeartMother is right. The cells you use must be capable of delivering the current draw of your motor.
If you build a LiPo pack
make sure the cells are balanced. If you don't have a balancer, just fully charge each cell before you construct them.
Do not short cells, use good solder technique.