2.8 gpa end of first semester sophomore year, can I still get into med school?

Never say never.

Possible but highly unlikely right now. You’ve put yourself into a deep, deep hole GPA-wise that may prove impossible to get out of. Start planning right now for 1 or more gap years and make sure you have a viable Plan B career.

You need to earn only As from now on in every science class you take. Every B pushes your med school dream farther away.

If you can get your GPA up to 3.5+ and your sGPA into the 3.4-3.5 range, you may have a chance at an osteopathic med school. If you want a MD, then you’re going to need a grade enhancing post-bacc or a SMP.