<p>(Basically echoing GP here) If you were plunging into depression and suicidal thoughts then there are issues at play here that a change in major aren’t going to solve. Have you spoken to someone (a professional) about all of this? You might not need pills but then again you might, and once the stress is back on you you may end up in exactly the same place. If you’ve looked at ChemE and MSE and decided MSE interests you more (and you seem to have a solid understanding of what MSE is) then that’s great, but you still have a lot of work to do.</p>
<p>Maybe your classes were just too hard, but suicidal thoughts are NOT a normal reaction to difficult classes. For your own sake figure that situation out before you go back into the pressure cooker that is first year engineering.</p>