My nipples have been tender. does it mean i could be pregnant? ttc, 30

Sure: But there are many reasons a nipple can be sore. Generally, the breasts are the most tender not just the nipples, but checking a pregnancy test is very reasonable and simple to do. Infections including yeast infections are also common casues. Trauma is also a a cause. A breast exam and possible imaging study like mammogram or ultrasound or ductal evaluation may be required.

You should know now: Tender nipples is one early possible sign but your question has been posted for some time now -- so you should know by now.