In group projects in college I find myself in either two kinds of positions: 1, I'm confident in my abilities but people piss me off because they are letting me do the heavy lifting, or 2, I feel useless, defensive and insecure due to other teammembers that I perceive as being more capable than me. 
Right now I'm in a group where I feel like I'm not good enough. I try to not think too much about it, but i constantly feel insecure in this group. No one has done anything to make me feel this way, but for example whenever someone asks me to further explain what I mean, I panic, and I feel like I said something stupid. Even if it might be a completely valid point, I start acting defensive because I already feel less-than the others (idk why). This is obviously very frustrating for me, since I just want to be a good group member. I actually started crying earlier during a group meeting, but kept talking to the others through it. I didn't let them know about it. 

Does anyone else go through this? Does someone have some advice or input of any kind feel free to leave it here cause I feel quite terrible