Text Message Virus?

I believe I may have received a virus via text message. I'll admit that I stupidly clicked on a link sent to me through a text message and entered the promo code that was also included in that message. I realized what I was potentially doing immediately after hitting "submit" and went into panic mode. I turned airplane mode on and then cleared my history and cookies/date - thankfully I "never" accept cookies and I have private browsing turned ON. Has anyone else encountered something like this? Is there anything I can do to find out if I do in fact have a virus of some sort on my iPhone? If I do have a virus, is there anything I can do myself to remove it? Any recommendations would be very much appreciated!! Thanks in advance!