Not gaining weight after I have lost quite a number of weights during my 1st tri

I completely understand where you're coming from. Losing weight during first trimester is normal due to morning sickness and was uneasy about not gaining much initially in the second. However, as long as the baby is growing and you're eating eating enough, there's usually no need to worry. Every body responds differently, so just keep up with checkups and trust your body's instincts!