going to the gym during pregnancy

so joined with my local gym over a yr ago & go occasionally already have 3 children so as & when get time... not been for last few weeks as been very tired & didn't feel like doing anything found out 4 weeks ago I'm pregnant & already gained afew pounds back.. 14 weeks pregnant now.. What equipment to you still use if going to a gym ??? I'm ready to start again occasionally not to lose weight but to stop putting it on too much now feeling ok again Thanks