Sex Positions... Safe or not? Help!

Ok so this is a little tmi but now that I’m in the second trimester my sex drive has gone up a ton! But, I’m overthinking certain positions and wondering they’re “safe” or not? Like missionary is still fairly comfortable but I feel like I’m squishing the baby when my boyfriend is leaning on my lower stomach. Same with laying on my back and arching up. I don’t want to do anything harmful or put any dangerous pressure on the baby. Am I being silly or are these legit worries?